ZIP codes and county lines in Indiana

359 of the 807 ZIP code areas in Indiana, or 44.5%, overlap more than one county. If your territories, tax rules or service areas are set by county and your list is by ZIP, these are the rows where the two disagree.

ZIP code areas: 807
In more than one county: 359
At least 5% in a second county: 238
Cross a state line: 0

How Indiana compares

Indiana ranks 11 of 52 (the 50 states, DC and Puerto Rico) by the share of its ZIP code areas that overlap more than one county. 92 of its counties have at least one split ZIP code area along an edge.

Counties with the most split ZIP code areas

Hancock County: 15 ZIP codes shared with another county
Marion County: 15 ZIP codes shared with another county
White County: 15 ZIP codes shared with another county
Clay County: 13 ZIP codes shared with another county
Delaware County: 13 ZIP codes shared with another county

Every split ZIP code area in Indiana

Each row is one ZCTA and the counties its land falls in, largest share first. Counties in another state are marked with that state. Sort by the share outside the main county to put the most evenly divided ones first.

	Share of land by county
46001	Madison County 96.5% Delaware County 3.5%	3.5%	2
46012	Madison County 89.3% Delaware County 10.7%	10.7%	2
46017	Madison County 96.8% Delaware County 3.2%	3.2%	2
46031	Hamilton County 68.4% Tipton County 31.6%	31.6%	2
46035	Clinton County 46.5% Montgomery County 31.9% Boone County 21.5%	53.5%	3
46036	Madison County 73.0% Tipton County 25.3% Grant County 1.7%	27.0%	3
46040	Hancock County 62.1% Hamilton County 19.4% Madison County 18.4%	37.9%	3
46041	Clinton County 96.7% Carroll County 3.3%	3.3%	2
46049	Tipton County 90.0% Clinton County 10.0%	10.0%	2
46050	Clinton County 76.5% Boone County 18.7% Tipton County 3.5% Hamilton County 1.3%	23.5%	4
46052	Boone County 100.0% Hendricks County under 0.1%	under 0.1%	2
46055	Hancock County 95.1% Hamilton County 4.9%	4.9%	2
46056	Madison County 77.1% Hancock County 19.1% Henry County 3.8%	22.9%	3
46058	Clinton County 99.3% Tippecanoe County 0.7%	0.7%	2
46060	Hamilton County 98.3% Madison County 1.7%	1.7%	2
46064	Madison County 88.6% Hancock County 11.4%	11.4%	2
46065	Clinton County 66.7% Carroll County 33.3%	33.3%	2
46068	Tipton County 97.1% Howard County 2.9%	2.9%	2
46069	Hamilton County 57.0% Boone County 35.9% Clinton County 7.1%	43.0%	3
46070	Madison County 97.3% Delaware County 2.8%	2.8%	2
46076	Tipton County 97.8% Howard County 2.2%	2.2%	2
46077	Boone County 92.2% Hamilton County 6.3% Marion County 1.5%	7.8%	3
46106	Johnson County 96.5% Morgan County 3.5%	3.5%	2
46112	Hendricks County 96.6% Boone County 3.4%	3.4%	2
46113	Morgan County 47.7% Marion County 37.3% Hendricks County 14.9%	52.3%	3
46115	Rush County 94.2% Hancock County 5.8%	5.8%	2
46117	Hancock County 90.7% Henry County 9.3%	9.3%	2
46118	Hendricks County 92.6% Morgan County 7.4%	7.4%	2
46120	Putnam County 81.5% Owen County 12.7% Morgan County 5.8%	18.5%	3
46121	Hendricks County 52.3% Putnam County 47.7%	47.7%	2
46124	Shelby County 46.4% Bartholomew County 30.5% Johnson County 23.1%	53.6%	3
46127	Rush County 71.1% Fayette County 28.9%	28.9%	2
46130	Shelby County 86.9% Hancock County 13.1%	13.1%	2
46131	Johnson County 93.1% Shelby County 6.9%	6.9%	2
46133	Rush County 52.9% Fayette County 47.1%	47.1%	2
46135	Putnam County 98.4% Parke County 1.6%	1.6%	2
46140	Hancock County 98.9% Rush County 0.6% Shelby County 0.4%	1.1%	3
46147	Boone County 90.8% Hendricks County 9.2%	9.2%	2
46148	Henry County 68.1% Rush County 31.9%	31.9%	2
46150	Rush County 89.2% Shelby County 10.8%	10.8%	2
46151	Morgan County 96.4% Monroe County 3.4% Johnson County 0.2%	3.6%	3
46156	Rush County 99.2% Decatur County 0.8%	0.8%	2
46158	Morgan County 88.6% Hendricks County 11.4%	11.4%	2
46160	Brown County 48.2% Morgan County 26.2% Johnson County 25.7%	51.8%	3
46161	Shelby County 85.1% Hancock County 11.0% Rush County 3.9%	14.9%	3
46162	Johnson County 54.0% Shelby County 46.0%	46.0%	2
46163	Hancock County 86.0% Shelby County 13.0% Marion County 1.0%	14.0%	3
46164	Brown County 86.1% Johnson County 13.9%	13.9%	2
46165	Hendricks County 96.4% Putnam County 3.6%	3.6%	2
46166	Morgan County 95.4% Owen County 4.6%	4.6%	2
46171	Putnam County 98.5% Clay County 1.5%	1.5%	2
46172	Putnam County 94.7% Montgomery County 5.3%	5.3%	2
46173	Rush County 95.2% Decatur County 2.2% Franklin County 1.9% Fayette County 0.7%	4.8%	4
46175	Putnam County 95.9% Parke County 4.1%	4.1%	2
46180	Morgan County 55.9% Hendricks County 44.1%	44.1%	2
46181	Johnson County 84.7% Brown County 15.3%	15.3%	2
46182	Shelby County 82.1% Rush County 17.9%	17.9%	2
46186	Hancock County 97.7% Henry County 2.3%	2.3%	2
46229	Marion County 89.7% Hancock County 10.3%	10.3%	2
46231	Hendricks County 52.1% Marion County 47.9%	47.9%	2
46234	Hendricks County 50.1% Marion County 49.9%	49.9%	2
46236	Marion County 99.8% Hancock County 0.1% Hamilton County under 0.1%	0.2%	3
46239	Marion County 99.2% Hancock County 0.8%	0.8%	2
46240	Marion County 97.8% Hamilton County 2.3%	2.3%	2
46250	Marion County 99.4% Hamilton County 0.6%	0.6%	2
46256	Marion County 92.0% Hamilton County 8.0%	8.0%	2
46259	Marion County 67.9% Johnson County 21.7% Shelby County 10.5%	32.1%	3
46260	Marion County 99.0% Hamilton County 1.0%	1.0%	2
46268	Marion County 97.7% Boone County 1.7% Hamilton County 0.6%	2.3%	3
46278	Marion County 95.8% Hendricks County 4.2%	4.2%	2
46307	Lake County 97.3% Porter County 2.7%	2.7%	2
46310	Jasper County 78.1% Newton County 21.9%	21.9%	2
46341	Porter County 49.7% Lake County 48.9% Jasper County 1.4%	50.3%	3
46342	Lake County 71.8% Porter County 28.1%	28.1%	2
46348	LaPorte County 98.9% Porter County 1.1%	1.1%	2
46360	LaPorte County 84.2% Porter County 15.8%	15.8%	2
46366	Starke County 85.1% Pulaski County 14.9%	14.9%	2
46374	Starke County 71.8% Jasper County 15.0% Pulaski County 13.3%	28.2%	3
46390	LaPorte County 99.3% Porter County 0.7%	0.7%	2
46391	LaPorte County 66.9% Porter County 33.1%	33.1%	2
46403	Lake County 89.5% Porter County 10.5%	10.5%	2
46501	Marshall County 96.8% Fulton County 3.2%	3.2%	2
46504	Marshall County 95.8% Kosciusko County 4.2%	4.2%	2
46506	Marshall County 61.5% St. Joseph County 37.8% Kosciusko County 0.7%	38.5%	3
46511	Marshall County 64.7% Starke County 22.7% Fulton County 12.0% Pulaski County 0.5%	35.3%	4
46524	Kosciusko County 98.6% Marshall County 1.4%	1.4%	2
46530	St. Joseph County 88.8% Elkhart County 11.3%	11.3%	2
46531	Starke County 98.9% Marshall County 1.1%	1.1%	2
46532	Starke County 58.7% LaPorte County 41.3%	41.3%	2
46536	St. Joseph County 91.4% Marshall County 8.6%	8.6%	2
46539	Kosciusko County 85.9% Fulton County 8.3% Marshall County 5.8%	14.1%	3
46540	Elkhart County 85.4% LaGrange County 14.6%	14.6%	2
46542	Kosciusko County 96.3% Elkhart County 3.7%	3.7%	2
46543	Elkhart County 64.5% LaGrange County 33.9% Noble County 1.6%	35.5%	3
46550	Elkhart County 53.7% Kosciusko County 35.0% Marshall County 6.5% St. Joseph County 4.9%	46.3%	4
46552	St. Joseph County 76.3% LaPorte County 23.7%	23.7%	2
46554	St. Joseph County 95.0% LaPorte County 5.0%	5.0%	2
46561	St. Joseph County 88.1% Elkhart County 11.9%	11.9%	2
46562	Kosciusko County 83.5% Whitley County 12.7% Noble County 3.8%	16.5%	3
46563	Marshall County 98.6% Starke County 1.2% St. Joseph County 0.1%	1.4%	3
46565	LaGrange County 99.4% Elkhart County 0.6%	0.6%	2
46567	Kosciusko County 61.2% Elkhart County 38.8%	38.8%	2
46570	Marshall County 97.7% Fulton County 2.3%	2.3%	2
46571	LaGrange County 95.2% Noble County 4.8%	4.8%	2
46573	Elkhart County 51.0% St. Joseph County 49.0%	49.0%	2
46574	LaPorte County 32.7% St. Joseph County 29.7% Marshall County 25.0% Starke County 12.7%	67.3%	4
46702	Huntington County 84.6% Wabash County 15.4%	15.4%	2
46705	DeKalb County 69.7% Steuben County 30.3%	30.3%	2
46706	DeKalb County 96.4% Allen County 3.6%	3.6%	2
46710	Noble County 86.9% DeKalb County 13.1%	13.1%	2
46714	Wells County 92.1% Adams County 7.9%	7.9%	2
46723	Whitley County 40.0% Allen County 37.0% Noble County 22.9%	60.0%	3
46725	Whitley County 98.0% Noble County 2.0%	2.0%	2
46732	Noble County 93.0% Kosciusko County 7.0%	7.0%	2
46733	Adams County 97.1% Allen County 2.9%	2.9%	2
46740	Adams County 91.8% Wells County 8.2%	8.2%	2
46742	Steuben County 68.7% DeKalb County 31.3%	31.3%	2
46747	Steuben County 74.4% DeKalb County 13.6% LaGrange County 12.0%	25.6%	3
46748	Allen County 92.7% Noble County 4.5% DeKalb County 2.7%	7.3%	3
46750	Huntington County 99.6% Whitley County 0.4%	0.4%	2
46755	Noble County 98.4% DeKalb County 1.6%	1.6%	2
46761	LaGrange County 99.0% Steuben County 1.0%	1.0%	2
46763	Noble County 81.3% DeKalb County 18.7%	18.7%	2
46764	Whitley County 89.8% Noble County 10.2%	10.2%	2
46767	Noble County 92.6% Elkhart County 5.4% LaGrange County 2.1%	7.4%	3
46770	Wells County 61.3% Huntington County 38.7%	38.7%	2
46773	Allen County 94.0% Adams County 6.0%	6.0%	2
46776	Steuben County 79.0% LaGrange County 21.1%	21.1%	2
46777	Wells County 92.3% Allen County 4.9% Adams County 2.8%	7.7%	3
46783	Huntington County 45.6% Allen County 33.0% Whitley County 19.6% Wells County 1.9%	54.4%	4
46787	Whitley County 90.3% Kosciusko County 8.3% Huntington County 1.4%	9.7%	3
46788	DeKalb County 53.5% Allen County 46.5%	46.5%	2
46792	Huntington County 76.2% Wells County 23.8%	23.8%	2
46793	DeKalb County 99.1% Steuben County 0.9%	0.9%	2
46795	LaGrange County 85.7% Noble County 14.3%	14.3%	2
46798	Allen County 96.8% Wells County 3.1%	3.1%	2
46799	Wells County 61.4% Allen County 38.6%	38.6%	2
46814	Allen County 88.0% Whitley County 12.0%	12.0%	2
46818	Allen County 98.1% Whitley County 1.9%	1.9%	2
46901	Howard County 84.5% Miami County 15.2% Cass County 0.2%	15.4%	3
46902	Howard County 97.6% Tipton County 2.4%	2.4%	2
46910	Fulton County 69.5% Kosciusko County 24.9% Miami County 5.6%	30.5%	3
46911	Miami County 79.2% Wabash County 20.8%	20.8%	2
46919	Grant County 49.7% Miami County 36.4% Howard County 13.9%	50.3%	3
46923	Carroll County 98.7% Tippecanoe County 1.4%	1.4%	2
46926	Miami County 93.3% Cass County 4.2% Wabash County 2.5%	6.7%	3
46928	Grant County 98.1% Madison County 1.6% Howard County 0.3%	1.9%	3
46929	Carroll County 88.5% Howard County 11.5%	11.5%	2
46932	Cass County 88.4% Howard County 9.3% Miami County 1.6% Carroll County 0.7%	11.6%	4
46939	Fulton County 90.6% Pulaski County 9.4%	9.4%	2
46940	Wabash County 72.0% Huntington County 23.8% Grant County 4.2%	28.0%	3
46947	Cass County 92.0% Carroll County 8.0%	8.0%	2
46950	Cass County 94.2% Fulton County 5.8%	5.8%	2
46951	Miami County 83.3% Fulton County 16.7%	16.7%	2
46952	Grant County 89.6% Wells County 4.7% Huntington County 3.1% Blackford County 2.7%	10.4%	4
46960	Pulaski County 60.7% Starke County 35.8% Fulton County 3.5%	39.3%	3
46962	Wabash County 90.4% Kosciusko County 8.4% Whitley County 1.3%	9.6%	3
46968	Pulaski County 59.4% Starke County 40.6%	40.6%	2
46970	Miami County 91.5% Cass County 7.6% Wabash County 0.8%	8.5%	3
46974	Wabash County 59.5% Miami County 40.5%	40.5%	2
46978	Cass County 88.9% Pulaski County 5.1% White County 4.8% Fulton County 1.1%	11.1%	4
46979	Howard County 88.2% Clinton County 6.5% Tipton County 5.3%	11.8%	3
46982	Kosciusko County 72.9% Wabash County 23.8% Fulton County 3.3%	27.1%	3
46985	Pulaski County 95.3% White County 4.0% Fulton County 0.7%	4.7%	3
46988	Cass County 96.3% Fulton County 3.8%	3.8%	2
46989	Grant County 97.0% Delaware County 2.0% Blackford County 1.1%	3.0%	3
46991	Grant County 83.0% Huntington County 15.4% Wells County 1.6%	17.0%	3
46992	Wabash County 99.5% Miami County 0.5%	0.5%	2
46996	Pulaski County 99.3% White County 0.6% Starke County 0.2%	0.8%	3
47001	Dearborn County 79.0% Ohio County 21.0%	21.0%	2
47003	Union County 96.5% Franklin County 3.5%	3.5%	2
47006	Ripley County 53.9% Franklin County 45.4% Decatur County 0.7%	46.1%	3
47010	Franklin County 90.6% Union County 9.4%	9.4%	2
47011	Switzerland County 90.7% Ohio County 9.3%	9.3%	2
47012	Franklin County 95.2% Dearborn County 4.8%	4.8%	2
47017	Ripley County 74.3% Switzerland County 15.6% Ohio County 10.1%	25.7%	3
47018	Dearborn County 45.0% Ohio County 27.7% Ripley County 24.3% Switzerland County 3.1%	55.0%	4
47024	Franklin County 99.1% Fayette County 0.9%	0.9%	2
47031	Ripley County 89.4% Dearborn County 10.6%	10.6%	2
47032	Dearborn County 92.8% Ripley County 7.2%	7.2%	2
47037	Ripley County 98.6% Jennings County 1.4%	1.4%	2
47040	Ohio County 68.3% Switzerland County 31.8%	31.8%	2
47041	Dearborn County 51.2% Ripley County 46.8% Franklin County 1.9%	48.8%	3
47043	Switzerland County 97.5% Jefferson County 2.5%	2.5%	2
47060	Dearborn County 57.1% Franklin County 42.9%	42.9%	2
47102	Scott County 80.7% Jackson County 19.3%	19.3%	2
47106	Clark County 91.2% Floyd County 4.8% Washington County 4.0%	8.8%	3
47108	Washington County 97.3% Orange County 2.7%	2.7%	2
47115	Harrison County 100.0% Washington County under 0.1%	under 0.1%	2
47117	Harrison County 95.5% Floyd County 4.5%	4.5%	2
47118	Crawford County 79.6% Perry County 11.8% Orange County 8.6%	20.4%	3
47119	Floyd County 86.1% Clark County 13.9%	13.9%	2
47120	Washington County 99.0% Harrison County 1.0%	1.0%	2
47122	Floyd County 66.3% Harrison County 33.7%	33.7%	2
47124	Floyd County 78.6% Harrison County 21.4%	21.4%	2
47125	Washington County 51.9% Orange County 48.1%	48.1%	2
47126	Clark County 96.2% Washington County 3.8%	3.8%	2
47136	Harrison County 54.0% Floyd County 46.0%	46.0%	2
47137	Crawford County 93.5% Harrison County 3.3% Perry County 3.2%	6.5%	3
47138	Jefferson County 53.7% Scott County 46.3%	46.3%	2
47140	Crawford County 58.7% Orange County 41.3%	41.3%	2
47147	Clark County 59.7% Jefferson County 24.1% Scott County 16.3%	40.3%	3
47150	Floyd County 99.5% Clark County 0.5%	0.5%	2
47164	Harrison County 66.8% Washington County 31.6% Floyd County 1.6%	33.2%	3
47165	Washington County 96.0% Floyd County 2.6% Clark County 1.4%	4.0%	3
47170	Scott County 62.9% Washington County 36.8% Jefferson County 0.2%	37.1%	3
47172	Clark County 87.8% Floyd County 12.2%	12.2%	2
47175	Crawford County 93.0% Orange County 7.0%	7.0%	2
47177	Scott County 69.9% Clark County 30.1%	30.1%	2
47201	Bartholomew County 84.5% Brown County 15.5%	15.5%	2
47224	Jefferson County 68.4% Switzerland County 31.6%	31.6%	2
47227	Jennings County 84.9% Jefferson County 15.1%	15.1%	2
47229	Jackson County 89.0% Jennings County 11.0%	11.0%	2
47230	Jefferson County 78.6% Scott County 15.2% Jennings County 6.2%	21.4%	3
47231	Jefferson County 64.3% Jennings County 35.7%	35.7%	2
47232	Bartholomew County 70.4% Jennings County 29.6%	29.6%	2
47234	Shelby County 96.9% Bartholomew County 3.1%	3.1%	2
47235	Jackson County 69.9% Brown County 30.1%	30.1%	2
47240	Decatur County 95.5% Shelby County 1.8% Franklin County 1.4% Ripley County 0.9% Rush County 0.3%	4.5%	5
47244	Bartholomew County 83.5% Decatur County 16.4%	16.4%	2
47246	Bartholomew County 99.4% Decatur County 0.6%	0.6%	2
47250	Jefferson County 84.7% Ripley County 10.5% Switzerland County 4.8%	15.3%	3
47260	Jackson County 99.4% Lawrence County 0.6%	0.6%	2
47264	Jackson County 74.3% Lawrence County 22.6% Monroe County 3.0%	25.6%	3
47265	Jennings County 99.7% Decatur County 0.3%	0.3%	2
47270	Jennings County 87.8% Jefferson County 12.2%	12.2%	2
47272	Decatur County 58.9% Shelby County 39.5% Rush County 1.6%	41.1%	3
47273	Jennings County 96.8% Bartholomew County 3.2%	3.2%	2
47274	Jackson County 87.9% Bartholomew County 5.5% Jennings County 5.0% Brown County 1.6%	12.1%	4
47281	Jackson County 60.3% Washington County 39.7%	39.7%	2
47283	Decatur County 81.5% Jennings County 14.3% Bartholomew County 4.2%	18.4%	3
47302	Delaware County 96.8% Henry County 3.2%	3.2%	2
47320	Delaware County 94.4% Randolph County 5.0% Jay County 0.6%	5.6%	3
47325	Union County 70.8% Fayette County 17.9% Wayne County 11.3%	29.2%	3
47326	Jay County 96.0% Adams County 4.0%	4.0%	2
47327	Wayne County 77.0% Henry County 23.0%	23.0%	2
47331	Fayette County 94.5% Union County 3.2% Franklin County 1.4% Wayne County 0.9%	5.5%	4
47334	Delaware County 96.6% Henry County 3.4%	3.4%	2
47336	Jay County 53.6% Delaware County 29.6% Blackford County 16.8%	46.4%	3
47338	Delaware County 92.8% Blackford County 7.2%	7.2%	2
47346	Wayne County 84.8% Henry County 15.2%	15.2%	2
47348	Blackford County 98.3% Grant County 1.7%	1.7%	2
47352	Henry County 61.6% Rush County 35.3% Fayette County 3.2%	38.4%	3
47353	Union County 99.7% Franklin County 0.3%	0.3%	2
47354	Randolph County 56.7% Henry County 22.8% Delaware County 14.3% Wayne County 6.2%	43.3%	4
47355	Randolph County 98.6% Wayne County 1.4%	1.4%	2
47356	Henry County 90.6% Madison County 5.6% Delaware County 3.8%	9.4%	3
47357	Wayne County 74.3% Fayette County 25.7%	25.7%	2
47358	Randolph County 93.6% Wayne County 6.4%	6.4%	2
47359	Blackford County 62.8% Wells County 37.2%	37.2%	2
47360	Henry County 94.5% Wayne County 4.2% Randolph County 1.4%	5.5%	3
47368	Randolph County 76.7% Delaware County 23.3%	23.3%	2
47369	Jay County 94.8% Blackford County 5.2%	5.2%	2
47371	Jay County 99.9% Randolph County under 0.1%	under 0.1%	2
47373	Jay County 94.3% Randolph County 5.7%	5.7%	2
47374	Wayne County 98.8% Union County 1.1%	1.1%	2
47380	Randolph County 88.6% Jay County 11.4%	11.4%	2
47384	Henry County 86.2% Hancock County 13.8%	13.8%	2
47390	Randolph County 93.1% Jay County 6.9%	6.9%	2
47393	Wayne County 88.0% Randolph County 12.0%	12.0%	2
47401	Monroe County 96.8% Brown County 3.2%	3.2%	2
47403	Monroe County 98.5% Greene County 1.5%	1.5%	2
47404	Monroe County 98.2% Owen County 1.8%	1.8%	2
47421	Lawrence County 99.8% Monroe County 0.2%	0.2%	2
47427	Owen County 88.4% Clay County 11.6%	11.6%	2
47432	Orange County 77.9% Dubois County 11.7% Martin County 10.4%	22.1%	3
47433	Owen County 55.3% Monroe County 30.4% Morgan County 14.3%	44.7%	3
47436	Lawrence County 69.9% Monroe County 30.1%	30.1%	2
47438	Greene County 52.3% Clay County 36.2% Sullivan County 11.5%	47.7%	3
47446	Lawrence County 91.0% Martin County 9.0%	9.0%	2
47448	Brown County 97.2% Monroe County 1.7% Bartholomew County 1.1%	2.8%	3
47452	Orange County 87.9% Lawrence County 11.6% Washington County 0.5%	12.1%	3
47456	Owen County 66.1% Morgan County 19.7% Putnam County 14.3%	33.9%	3
47459	Greene County 97.6% Owen County 2.4%	2.4%	2
47460	Owen County 96.8% Monroe County 2.1% Greene County 1.1%	3.2%	3
47462	Lawrence County 56.1% Greene County 30.8% Monroe County 13.1%	43.9%	3
47468	Monroe County 77.1% Brown County 22.9%	22.9%	2
47470	Lawrence County 82.0% Martin County 18.1%	18.1%	2
47471	Greene County 78.9% Owen County 21.1%	21.1%	2
47513	Dubois County 51.9% Crawford County 26.1% Perry County 17.3% Orange County 4.7%	48.1%	4
47523	Warrick County 54.3% Spencer County 43.6% Dubois County 2.1%	45.7%	3
47527	Dubois County 98.8% Orange County 1.2%	1.2%	2
47529	Daviess County 94.6% Greene County 5.4%	5.4%	2
47532	Dubois County 61.8% Spencer County 32.6% Perry County 5.5%	38.2%	3
47537	Spencer County 54.4% Warrick County 45.6%	45.6%	2
47541	Dubois County 84.6% Warrick County 11.1% Pike County 3.2% Spencer County 1.1%	15.4%	4
47542	Dubois County 98.8% Pike County 1.2%	1.2%	2
47553	Martin County 61.0% Daviess County 39.0%	39.0%	2
47561	Knox County 94.2% Sullivan County 5.8%	5.8%	2
47562	Daviess County 98.8% Martin County 1.2%	1.2%	2
47564	Pike County 74.1% Dubois County 25.9%	25.9%	2
47576	Perry County 82.8% Crawford County 17.2%	17.2%	2
47577	Spencer County 58.4% Perry County 41.6%	41.6%	2
47578	Knox County 66.9% Greene County 33.1%	33.1%	2
47588	Spencer County 56.5% Perry County 43.5%	43.5%	2
47590	Pike County 85.5% Dubois County 14.5%	14.5%	2
47601	Warrick County 94.2% Spencer County 5.8%	5.8%	2
47612	Gibson County 60.8% Posey County 39.2%	39.2%	2
47613	Warrick County 82.1% Gibson County 17.9%	17.9%	2
47616	Gibson County 53.1% Posey County 46.9%	46.9%	2
47619	Warrick County 83.0% Gibson County 12.6% Pike County 4.4%	17.0%	3
47633	Posey County 89.0% Gibson County 10.4% Vanderburgh County 0.6%	11.0%	3
47637	Warrick County 92.3% Spencer County 7.7%	7.7%	2
47639	Gibson County 72.9% Vanderburgh County 26.2% Warrick County 0.9%	27.1%	3
47640	Gibson County 68.3% Pike County 31.7%	31.7%	2
47660	Gibson County 64.0% Pike County 34.8% Warrick County 1.2%	36.0%	3
47712	Vanderburgh County 80.9% Posey County 19.1%	19.1%	2
47725	Vanderburgh County 97.8% Warrick County 1.6% Gibson County 0.7%	2.3%	3
47802	Vigo County 99.7% Clay County 0.3%	0.3%	2
47833	Clay County 57.4% Owen County 42.6%	42.6%	2
47834	Clay County 78.8% Parke County 12.2% Vigo County 9.1%	21.2%	3
47837	Parke County 73.8% Clay County 26.2%	26.2%	2
47840	Clay County 95.3% Putnam County 4.7%	4.7%	2
47841	Clay County 97.1% Owen County 2.9%	2.9%	2
47842	Vermillion County 98.1% Vigo County 1.9%	1.9%	2
47848	Sullivan County 86.9% Greene County 13.1%	13.1%	2
47850	Sullivan County 75.5% Vigo County 24.5%	24.5%	2
47858	Clay County 61.4% Vigo County 24.9% Sullivan County 13.7%	38.6%	3
47866	Vigo County 85.0% Sullivan County 15.0%	15.0%	2
47868	Owen County 81.2% Clay County 14.3% Putnam County 4.6%	18.8%	3
47872	Parke County 99.7% Putnam County 0.3%	0.3%	2
47874	Parke County 76.6% Vigo County 19.3% Clay County 4.1%	23.4%	3
47879	Sullivan County 99.0% Clay County 1.0%	1.0%	2
47905	Tippecanoe County 98.1% Carroll County 1.5% Clinton County 0.5%	1.9%	3
47906	Tippecanoe County 92.7% White County 4.0% Warren County 3.4%	7.3%	3
47917	Warren County 59.1% Benton County 40.9%	40.9%	2
47918	Fountain County 59.6% Warren County 38.0% Tippecanoe County 2.5%	40.4%	3
47920	Tippecanoe County 76.5% White County 19.9% Carroll County 3.6%	23.5%	3
47921	Benton County 52.5% Warren County 47.5%	47.5%	2
47922	Newton County 91.5% Jasper County 8.5%	8.5%	2
47923	White County 97.5% Carroll County 2.5%	2.5%	2
47926	White County 63.5% Carroll County 36.5%	36.5%	2
47930	Tippecanoe County 81.2% Montgomery County 17.6% Clinton County 1.2%	18.8%	3
47932	Fountain County 63.7% Warren County 19.3% Vermillion County 17.0%	36.3%	3
47933	Montgomery County 98.2% Fountain County 1.4% Boone County 0.4%	1.8%	3
47942	Benton County 95.8% Newton County 4.2%	4.2%	2
47943	Newton County 54.9% Jasper County 45.1%	45.1%	2
47944	Benton County 97.6% Warren County 1.9% White County 0.5%	2.4%	3
47946	Pulaski County 80.7% Jasper County 19.3%	19.3%	2
47948	Newton County 54.4% Jasper County 28.1% Benton County 17.5%	45.6%	3
47949	Fountain County 96.7% Montgomery County 3.3%	3.3%	2
47950	White County 90.2% Carroll County 9.8%	9.8%	2
47952	Fountain County 65.6% Parke County 34.4%	34.4%	2
47954	Montgomery County 94.4% Putnam County 5.6%	5.6%	2
47955	Montgomery County 88.4% Tippecanoe County 11.6%	11.6%	2
47957	Pulaski County 86.4% Jasper County 13.6%	13.6%	2
47959	White County 85.2% Jasper County 11.7% Pulaski County 3.1%	14.8%	3
47960	White County 84.5% Carroll County 15.3% Pulaski County 0.3%	15.6%	3
47967	Montgomery County 77.1% Tippecanoe County 22.9%	22.9%	2
47968	Montgomery County 88.1% Boone County 10.4% Hendricks County 1.4%	11.9%	3
47970	Warren County 48.2% Benton County 46.5% Tippecanoe County 3.6% White County 1.7%	51.8%	4
47975	Warren County 95.6% Benton County 4.4%	4.4%	2
47977	Jasper County 61.5% Benton County 35.7% White County 2.8%	38.5%	3
47978	Jasper County 96.5% Newton County 2.3% White County 1.1%	3.5%	3
47981	Tippecanoe County 98.2% Montgomery County 1.8%	1.8%	2
47989	Montgomery County 65.0% Parke County 33.2% Putnam County 1.8%	35.0%	3
47990	Montgomery County 90.7% Fountain County 9.3%	9.3%	2
47994	Montgomery County 61.5% Fountain County 38.5%	38.5%	2
47995	White County 95.9% Benton County 2.4% Jasper County 1.7%	4.1%	3

What to do with this

If a ZIP code in your list is split, the ZIP alone cannot tell you which county an address is in. For most work that is fine. It matters when the county decides something: a sales tax rate, a licence, a franchise agreement written by county, or a service area somebody promised by county name.

The ZIP list audit checks your own list against the same Census data in your browser, and the ZIP spreadsheet comparison covers when a ZIP list is enough and when it is not.

What these numbers are, and are not

A ZCTA is not quite a ZIP code. ZIP Code Tabulation Areas are the Census Bureau's approximations of ZIP code areas, built by grouping census blocks by the ZIP codes of the addresses in them. USPS ZIP codes are delivery routes, not areas, and the two do not always match.
Some ZIP codes have no ZCTA at all. PO box ZIPs, ZIPs for a single building or a single large organisation, and military ZIPs usually have no area of their own, so they cannot be split across counties here and will not match any area in a map.
Land share is not population share. A ZCTA with 20% of its land in a second county might have almost none of its people there, or most of them. The shares here measure area, which is what the Census file publishes.
Tiny overlaps are included. A ZCTA counts as overlapping a county if the Census file lists any part of it there, including slivers along a road or river. That is why the share with at least 5% of land in a second county is shown alongside.

Source: U.S. Census Bureau, 2020 ZCTA to County relationship file, public domain. Counts use 2020 ZCTAs and 2020 county boundaries. ZIP codes added by USPS since then are not in it, and Connecticut's counties have since been replaced by planning regions in Census data.

Route by the boundary, not the ZIP

MapLogics decides who owns an address from a boundary you draw or import, so a ZIP that straddles two counties is answered by where the address actually is. There is a free trial if you want to see it on your own addresses.

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