ZIP codes and county lines in Kansas

338 of the 710 ZIP code areas in Kansas, or 47.6%, 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: 710
In more than one county: 338
At least 5% in a second county: 282
Cross a state line: 8

How Kansas compares

Kansas ranks 9 of 52 (the 50 states, DC and Puerto Rico) by the share of its ZIP code areas that overlap more than one county. 105 of its counties have at least one split ZIP code area along an edge. 8 of its ZIP code areas also reach into Nebraska, so a ZIP list that is meant to stop at the state line does not.

Counties with the most split ZIP code areas

Sedgwick County: 15 ZIP codes shared with another county
Jackson County: 14 ZIP codes shared with another county
Shawnee County: 14 ZIP codes shared with another county
Reno County: 13 ZIP codes shared with another county
Marion County: 12 ZIP codes shared with another county

Every split ZIP code area in Kansas

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
66002	Atchison County 73.5% Doniphan County 17.5% Jefferson County 4.8% Leavenworth County 4.1%	26.5%	4
66006	Douglas County 94.6% Franklin County 5.4%	5.4%	2
66010	Linn County 93.7% Bourbon County 6.3%	6.3%	2
66012	Leavenworth County 55.8% Wyandotte County 44.2%	44.2%	2
66013	Miami County 58.3% Johnson County 41.7%	41.7%	2
66014	Linn County 96.3% Anderson County 3.7%	3.7%	2
66015	Anderson County 76.9% Allen County 23.1%	23.1%	2
66017	Doniphan County 93.3% Brown County 6.7%	6.7%	2
66021	Johnson County 64.2% Miami County 26.5% Douglas County 9.3%	35.8%	3
66025	Douglas County 69.1% Johnson County 30.9%	30.9%	2
66026	Miami County 50.2% Linn County 49.8%	49.8%	2
66033	Anderson County 78.2% Franklin County 15.1% Linn County 6.8%	21.8%	3
66039	Anderson County 93.2% Allen County 6.8%	6.8%	2
66040	Linn County 70.4% Miami County 29.6%	29.6%	2
66041	Atchison County 86.9% Doniphan County 9.2% Brown County 3.9%	13.1%	3
66042	Franklin County 62.0% Miami County 38.0%	38.0%	2
66044	Douglas County 38.0% Jefferson County 33.0% Leavenworth County 28.9%	62.0%	3
66050	Douglas County 99.2% Shawnee County 0.8%	0.8%	2
66054	Jefferson County 63.6% Leavenworth County 36.4%	36.4%	2
66060	Jefferson County 51.4% Atchison County 48.6%	48.6%	2
66064	Miami County 96.5% Franklin County 3.5%	3.5%	2
66072	Linn County 96.6% Miami County 3.4%	3.4%	2
66080	Franklin County 67.5% Anderson County 32.5%	32.5%	2
66083	Miami County 57.4% Johnson County 42.6%	42.6%	2
66086	Leavenworth County 98.9% Jefferson County 1.1%	1.1%	2
66088	Jefferson County 97.0% Atchison County 3.0%	3.0%	2
66092	Franklin County 65.0% Miami County 20.5% Douglas County 14.5%	35.0%	3
66093	Anderson County 60.4% Coffey County 39.6%	39.6%	2
66094	Brown County 53.0% Doniphan County 47.0%	47.0%	2
66095	Franklin County 92.9% Anderson County 7.1%	7.1%	2
66097	Jefferson County 96.0% Leavenworth County 4.0%	4.0%	2
66109	Wyandotte County 93.7% Leavenworth County 6.3%	6.3%	2
66216	Johnson County 99.8% Wyandotte County 0.2%	0.2%	2
66402	Shawnee County 97.2% Osage County 2.8%	2.8%	2
66403	Marshall County 75.2% Nemaha County 24.8%	24.8%	2
66404	Nemaha County 98.1% Marshall County 1.9%	1.9%	2
66407	Pottawatomie County 58.8% Wabaunsee County 41.2%	41.2%	2
66409	Shawnee County 73.7% Douglas County 24.0% Osage County 2.3%	26.3%	3
66411	Marshall County 84.1% Riley County 15.9%	15.9%	2
66412	Marshall County 83.7% Washington County 16.4%	16.4%	2
66413	Osage County 88.5% Lyon County 8.0% Wabaunsee County 3.5%	11.6%	3
66416	Jackson County 90.8% Nemaha County 9.2%	9.2%	2
66419	Jackson County 70.0% Jefferson County 30.0%	30.0%	2
66422	Pottawatomie County 77.1% Jackson County 22.9%	22.9%	2
66424	Brown County 68.1% Atchison County 31.9%	31.9%	2
66427	Marshall County 89.8% Pottawatomie County 10.2%	10.2%	2
66431	Wabaunsee County 91.7% Shawnee County 8.3%	8.3%	2
66432	Pottawatomie County 76.9% Jackson County 11.9% Nemaha County 11.3%	23.1%	3
66436	Jackson County 84.8% Atchison County 13.9% Jefferson County 1.4%	15.2%	3
66439	Brown County 57.7% Atchison County 38.5% Jackson County 3.8%	42.3%	3
66441	Geary County 93.9% Dickinson County 4.8% Riley County 1.3%	6.1%	3
66442	Riley County 61.2% Geary County 38.8%	38.8%	2
66502	Riley County 60.1% Pottawatomie County 20.5% Geary County 15.6% Wabaunsee County 3.8%	39.9%	4
66512	Jefferson County 83.3% Jackson County 11.7% Shawnee County 5.0%	16.7%	3
66516	Jackson County 70.4% Brown County 29.6%	29.6%	2
66521	Pottawatomie County 91.6% Nemaha County 8.4%	8.4%	2
66523	Osage County 96.1% Lyon County 3.9%	3.9%	2
66524	Osage County 50.6% Douglas County 44.1% Shawnee County 3.0% Franklin County 2.3%	49.4%	4
66528	Osage County 82.0% Franklin County 17.9%	17.9%	2
66532	Brown County 78.6% Doniphan County 21.4%	21.4%	2
66533	Shawnee County 96.1% Jackson County 3.9%	3.9%	2
66534	Nemaha County 80.0% Brown County 20.0%	20.0%	2
66536	Pottawatomie County 74.2% Shawnee County 10.6% Jackson County 8.5% Wabaunsee County 6.7%	25.8%	4
66539	Shawnee County 96.4% Jackson County 3.6%	3.6%	2
66540	Jackson County 86.8% Nemaha County 12.6% Pottawatomie County 0.6%	13.2%	3
66541	Marshall County 72.0% Pawnee County, NE 28.0%	28.0%	2
66544	Marshall County 84.0% Nemaha County 16.0%	16.0%	2
66546	Shawnee County 91.5% Osage County 8.6%	8.6%	2
66547	Pottawatomie County 77.2% Wabaunsee County 22.8%	22.8%	2
66548	Marshall County 95.1% Washington County 2.5% Riley County 2.4%	4.9%	3
66550	Nemaha County 78.7% Jackson County 10.9% Brown County 10.3%	21.3%	3
66610	Shawnee County 92.3% Wabaunsee County 7.7%	7.7%	2
66614	Shawnee County 83.6% Wabaunsee County 16.4%	16.4%	2
66615	Shawnee County 77.7% Wabaunsee County 22.3%	22.3%	2
66617	Shawnee County 82.8% Jefferson County 16.0% Jackson County 1.2%	17.2%	3
66701	Bourbon County 97.8% Crawford County 2.2%	2.2%	2
66711	Crawford County 88.5% Bourbon County 11.5%	11.5%	2
66716	Bourbon County 83.4% Allen County 16.6%	16.6%	2
66717	Wilson County 99.4% Woodson County 0.6%	0.6%	2
66720	Neosho County 71.5% Wilson County 24.2% Allen County 3.0% Woodson County 1.3%	28.5%	4
66724	Crawford County 63.0% Cherokee County 37.0%	37.0%	2
66736	Wilson County 88.1% Elk County 10.0% Woodson County 0.8% Greenwood County 0.6% Montgomery County 0.5%	11.9%	5
66738	Bourbon County 86.2% Linn County 13.8%	13.8%	2
66746	Crawford County 57.0% Bourbon County 43.0%	43.0%	2
66748	Allen County 81.3% Woodson County 15.7% Neosho County 3.0%	18.7%	3
66753	Crawford County 54.2% Cherokee County 35.5% Labette County 7.8% Neosho County 2.6%	45.8%	4
66754	Bourbon County 92.5% Linn County 7.5%	7.5%	2
66755	Allen County 93.7% Bourbon County 6.3%	6.3%	2
66757	Wilson County 75.8% Montgomery County 24.2%	24.2%	2
66758	Woodson County 71.1% Coffey County 16.5% Anderson County 6.5% Allen County 5.9%	28.9%	4
66762	Crawford County 82.5% Cherokee County 17.5%	17.5%	2
66772	Allen County 67.3% Bourbon County 17.4% Neosho County 15.3%	32.7%	3
66776	Neosho County 68.8% Wilson County 27.5% Labette County 2.8% Montgomery County 0.9%	31.2%	4
66777	Greenwood County 51.3% Woodson County 42.6% Wilson County 6.1%	48.7%	3
66780	Crawford County 62.8% Neosho County 27.3% Bourbon County 9.8%	37.2%	3
66781	Cherokee County 94.6% Crawford County 5.4%	5.4%	2
66801	Lyon County 84.5% Chase County 15.5%	15.5%	2
66834	Wabaunsee County 56.0% Geary County 23.8% Morris County 20.1%	44.0%	3
66835	Lyon County 98.9% Morris County 1.1%	1.1%	2
66838	Morris County 94.4% Marion County 3.2% Chase County 2.4%	5.6%	3
66840	Butler County 53.6% Marion County 25.3% Chase County 21.1%	46.4%	3
66843	Chase County 97.7% Marion County 2.3%	2.3%	2
66846	Morris County 83.9% Lyon County 11.1% Chase County 4.3% Wabaunsee County 0.7%	16.1%	4
66849	Morris County 51.1% Geary County 48.9%	48.9%	2
66852	Coffey County 58.0% Woodson County 23.9% Greenwood County 18.1%	42.0%	3
66854	Lyon County 71.0% Coffey County 29.0%	29.0%	2
66856	Coffey County 66.3% Osage County 33.6%	33.6%	2
66858	Marion County 92.0% Chase County 8.0%	8.0%	2
66859	Marion County 81.1% Morris County 18.9%	18.9%	2
66860	Greenwood County 81.6% Lyon County 18.4%	18.4%	2
66864	Lyon County 69.2% Coffey County 30.8%	30.8%	2
66865	Lyon County 66.5% Chase County 33.5%	33.5%	2
66866	Marion County 90.7% Harvey County 9.3%	9.3%	2
66868	Lyon County 78.1% Osage County 20.3% Coffey County 1.6%	21.9%	3
66870	Greenwood County 80.0% Woodson County 19.9%	19.9%	2
66871	Coffey County 94.8% Osage County 5.2%	5.2%	2
66872	Morris County 94.0% Geary County 6.0%	6.0%	2
66901	Cloud County 88.9% Republic County 11.1%	11.1%	2
66933	Washington County 95.0% Riley County 5.0%	5.0%	2
66937	Washington County 53.6% Clay County 46.4%	46.4%	2
66938	Cloud County 67.3% Washington County 19.0% Republic County 9.0% Clay County 4.7%	32.7%	4
66939	Republic County 82.5% Jewell County 17.5%	17.5%	2
66942	Jewell County 98.1% Republic County 1.9%	1.9%	2
66945	Washington County 99.0% Marshall County 0.9%	0.9%	2
66948	Cloud County 77.8% Republic County 21.4% Jewell County 0.8%	22.2%	3
66951	Smith County 73.9% Phillips County 26.1%	26.1%	2
66952	Smith County 98.7% Jewell County 1.3%	1.3%	2
66955	Washington County 77.9% Thayer County, NE 22.1%	22.1%	2
66960	Republic County 95.4% Washington County 4.6%	4.6%	2
66962	Washington County 78.4% Clay County 21.6%	21.6%	2
67004	Sumner County 71.9% Harper County 28.1%	28.1%	2
67008	Cowley County 56.5% Butler County 43.5%	43.5%	2
67017	Butler County 89.5% Sedgwick County 10.5%	10.5%	2
67018	Harper County 92.0% Sumner County 8.0%	8.0%	2
67020	Harvey County 65.4% Reno County 29.1% Sedgwick County 5.6%	34.6%	3
67024	Chautauqua County 62.6% Cowley County 37.4%	37.4%	2
67025	Sedgwick County 61.8% Kingman County 36.4% Reno County 1.8%	38.2%	3
67026	Sedgwick County 72.5% Sumner County 27.5%	27.5%	2
67028	Kiowa County 42.2% Pratt County 38.1% Barber County 19.7%	57.8%	3
67029	Comanche County 97.9% Kiowa County 2.1%	2.1%	2
67031	Sumner County 94.0% Sedgwick County 6.0%	6.0%	2
67035	Kingman County 65.7% Pratt County 25.3% Reno County 9.0%	34.3%	3
67039	Butler County 95.7% Cowley County 4.3%	4.3%	2
67045	Greenwood County 99.3% Butler County 0.7%	0.7%	2
67047	Greenwood County 62.8% Elk County 27.0% Wilson County 10.2%	37.2%	3
67049	Harper County 88.9% Sumner County 11.1%	11.1%	2
67050	Sedgwick County 97.8% Reno County 2.2%	2.2%	2
67051	Sumner County 89.1% Cowley County 10.9%	10.9%	2
67054	Kiowa County 96.4% Edwards County 3.6%	3.6%	2
67058	Harper County 85.8% Kingman County 14.3%	14.3%	2
67059	Kiowa County 71.6% Edwards County 15.6% Pratt County 12.8%	28.4%	3
67061	Barber County 66.7% Harper County 33.3%	33.3%	2
67062	Harvey County 89.9% McPherson County 7.3% Marion County 2.9%	10.1%	3
67065	Pratt County 56.5% Barber County 40.9% Kingman County 2.7%	43.5%	3
67068	Kingman County 91.5% Reno County 8.5%	8.5%	2
67072	Butler County 90.5% Cowley County 9.4%	9.4%	2
67106	Sumner County 55.8% Sedgwick County 41.3% Kingman County 2.9%	44.2%	3
67107	McPherson County 69.7% Harvey County 30.3%	30.3%	2
67108	Sedgwick County 63.5% Reno County 36.5%	36.5%	2
67110	Sumner County 52.7% Sedgwick County 44.3% Cowley County 3.0%	47.3%	3
67112	Kingman County 80.8% Barber County 19.2%	19.2%	2
67114	Harvey County 72.0% Marion County 13.6% Butler County 13.1% McPherson County 1.4%	28.1%	4
67118	Kingman County 90.4% Sedgwick County 5.5% Harper County 2.2% Sumner County 1.8%	9.6%	4
67119	Sumner County 73.5% Cowley County 26.6%	26.6%	2
67120	Sumner County 61.1% Sedgwick County 38.9%	38.9%	2
67122	Greenwood County 58.0% Elk County 42.0%	42.0%	2
67127	Comanche County 88.4% Clark County 11.6%	11.6%	2
67133	Butler County 99.4% Sedgwick County 0.6%	0.6%	2
67134	Pratt County 64.7% Barber County 35.3%	35.3%	2
67135	Harvey County 51.9% Sedgwick County 48.1%	48.1%	2
67137	Greenwood County 71.5% Elk County 28.5%	28.5%	2
67146	Cowley County 86.4% Sumner County 13.6%	13.6%	2
67147	Sedgwick County 92.3% Harvey County 7.7%	7.7%	2
67151	Harvey County 84.6% Marion County 15.4%	15.4%	2
67154	Butler County 69.7% Harvey County 30.3%	30.3%	2
67155	Comanche County 87.1% Kiowa County 12.9%	12.9%	2
67159	Kingman County 68.7% Harper County 31.3%	31.3%	2
67230	Sedgwick County 99.3% Butler County 0.7%	0.7%	2
67335	Montgomery County 57.6% Labette County 40.3% Wilson County 2.1%	42.4%	3
67336	Cherokee County 55.7% Labette County 44.3%	44.3%	2
67337	Montgomery County 71.8% Labette County 28.2%	28.2%	2
67344	Montgomery County 54.6% Chautauqua County 32.8% Elk County 12.6%	45.4%	3
67346	Elk County 55.4% Chautauqua County 44.6%	44.6%	2
67347	Montgomery County 60.6% Chautauqua County 39.4%	39.4%	2
67351	Montgomery County 80.2% Labette County 19.8%	19.8%	2
67352	Elk County 78.3% Chautauqua County 21.7%	21.7%	2
67353	Elk County 60.6% Chautauqua County 39.4%	39.4%	2
67356	Labette County 92.3% Cherokee County 7.7%	7.7%	2
67357	Labette County 73.8% Neosho County 26.2%	26.2%	2
67401	Saline County 95.6% Ottawa County 4.4%	4.4%	2
67410	Dickinson County 99.5% Clay County 0.5%	0.5%	2
67416	Saline County 87.4% McPherson County 12.6%	12.6%	2
67418	Lincoln County 75.4% Mitchell County 24.6%	24.6%	2
67420	Mitchell County 93.5% Cloud County 5.8% Jewell County 0.7%	6.5%	3
67425	Saline County 55.2% Ellsworth County 44.8%	44.8%	2
67427	Rice County 68.6% Ellsworth County 31.4%	31.4%	2
67428	McPherson County 86.5% Marion County 13.4%	13.4%	2
67430	Jewell County 53.9% Mitchell County 36.9% Smith County 6.3% Osborne County 3.0%	46.1%	4
67432	Clay County 90.1% Ottawa County 9.5% Riley County 0.4%	9.9%	3
67436	Ottawa County 75.2% Cloud County 24.9%	24.9%	2
67437	Osborne County 77.3% Smith County 22.8%	22.8%	2
67439	Ellsworth County 95.4% Lincoln County 4.6%	4.6%	2
67444	Ellsworth County 60.4% Rice County 39.6%	39.6%	2
67445	Cloud County 89.9% Ottawa County 10.1%	10.1%	2
67446	Mitchell County 83.9% Jewell County 16.1%	16.1%	2
67447	Clay County 58.9% Riley County 41.1%	41.1%	2
67448	Saline County 45.3% Dickinson County 29.5% McPherson County 25.2%	54.7%	3
67449	Morris County 64.7% Dickinson County 35.3%	35.3%	2
67450	Ellsworth County 69.9% Barton County 30.1%	30.1%	2
67451	Dickinson County 98.8% Marion County 1.2%	1.2%	2
67452	Mitchell County 55.6% Lincoln County 44.4%	44.4%	2
67456	McPherson County 68.5% Saline County 31.5%	31.5%	2
67458	Clay County 76.2% Ottawa County 23.8%	23.8%	2
67464	McPherson County 59.2% Ellsworth County 40.8%	40.8%	2
67466	Cloud County 58.6% Ottawa County 31.7% Clay County 9.7%	41.4%	3
67467	Ottawa County 99.6% Lincoln County 0.4%	0.4%	2
67470	Saline County 86.3% Ottawa County 13.7%	13.7%	2
67474	Smith County 54.0% Osborne County 46.0%	46.0%	2
67475	Marion County 78.1% Dickinson County 21.9%	21.9%	2
67480	Ottawa County 47.3% Dickinson County 32.6% Saline County 20.1%	52.7%	3
67481	Lincoln County 97.8% Russell County 2.2%	2.2%	2
67484	Ottawa County 67.2% Saline County 24.1% Lincoln County 8.7%	32.8%	3
67485	Osborne County 51.5% Mitchell County 48.5%	48.5%	2
67487	Clay County 81.3% Dickinson County 12.9% Geary County 5.8%	18.8%	3
67490	Ellsworth County 59.4% Russell County 32.5% Lincoln County 8.1%	40.6%	3
67491	McPherson County 79.0% Rice County 21.0%	21.0%	2
67502	Reno County 98.6% Rice County 1.4%	1.4%	2
67511	Rush County 64.1% Barton County 35.9%	35.9%	2
67512	Rice County 96.0% Reno County 4.0%	4.0%	2
67518	Ness County 92.5% Lane County 7.5%	7.5%	2
67519	Edwards County 87.5% Pawnee County 12.5%	12.5%	2
67521	Ness County 78.3% Trego County 21.7%	21.7%	2
67522	Reno County 78.3% Harvey County 21.7%	21.7%	2
67523	Pawnee County 65.7% Hodgeman County 34.3%	34.3%	2
67525	Barton County 97.6% Rice County 2.4%	2.4%	2
67526	Barton County 57.7% Stafford County 35.6% Rice County 6.8%	42.3%	3
67530	Barton County 90.8% Stafford County 9.2%	9.2%	2
67546	McPherson County 79.8% Rice County 16.4% Reno County 3.1% Harvey County 0.7%	20.2%	4
67547	Edwards County 84.5% Hodgeman County 15.4%	15.4%	2
67550	Pawnee County 99.3% Stafford County 0.7%	0.7%	2
67556	Rush County 64.2% Ness County 23.1% Ellis County 12.7%	35.8%	3
67557	Stafford County 58.5% Pawnee County 18.4% Pratt County 14.7% Edwards County 8.5%	41.5%	4
67559	Rush County 65.9% Pawnee County 34.1%	34.1%	2
67563	Edwards County 52.0% Ford County 40.4% Hodgeman County 7.6%	48.0%	3
67565	Rush County 58.9% Barton County 40.1% Ellis County 1.0%	41.1%	3
67567	Pawnee County 44.9% Barton County 39.4% Stafford County 12.5% Rush County 3.2%	55.1%	4
67570	Reno County 89.6% Kingman County 10.4%	10.4%	2
67572	Ness County 53.0% Trego County 47.0%	47.0%	2
67575	Rush County 85.2% Pawnee County 14.8%	14.8%	2
67576	Stafford County 99.8% Pratt County 0.3%	0.3%	2
67579	Rice County 59.4% Reno County 40.6%	40.6%	2
67583	Reno County 47.2% Pratt County 43.3% Stafford County 9.5%	52.8%	3
67584	Ness County 45.5% Trego County 25.4% Gove County 21.1% Lane County 8.1%	54.5%	4
67622	Norton County 96.3% Phillips County 3.7%	3.7%	2
67623	Osborne County 95.5% Smith County 4.5%	4.5%	2
67629	Norton County 53.7% Decatur County 46.3%	46.3%	2
67631	Trego County 85.5% Graham County 13.3% Sheridan County 1.2%	14.5%	3
67632	Rooks County 64.5% Graham County 35.5%	35.5%	2
67635	Decatur County 69.7% Sheridan County 30.3%	30.3%	2
67637	Ellis County 50.2% Trego County 48.6% Graham County 1.2%	49.8%	3
67639	Phillips County 95.9% Rooks County 4.1%	4.1%	2
67640	Ellis County 55.2% Russell County 44.8%	44.8%	2
67643	Decatur County 75.9% Sheridan County 24.1%	24.1%	2
67644	Phillips County 93.3% Rooks County 6.7%	6.7%	2
67645	Norton County 70.3% Graham County 29.7%	29.7%	2
67646	Phillips County 55.6% Norton County 25.8% Rooks County 12.9% Graham County 5.7%	44.4%	4
67648	Russell County 66.5% Osborne County 28.8% Lincoln County 4.7%	33.5%	3
67649	Russell County 50.6% Osborne County 49.4%	49.4%	2
67651	Osborne County 42.2% Rooks County 40.3% Ellis County 13.2% Russell County 4.3%	57.8%	4
67653	Decatur County 61.6% Norton County 38.4%	38.4%	2
67656	Trego County 88.3% Graham County 11.7%	11.7%	2
67657	Rooks County 50.3% Graham County 48.6% Trego County 1.1%	49.7%	3
67658	Russell County 64.3% Osborne County 35.7%	35.7%	2
67661	Phillips County 99.9% Rooks County under 0.1%	under 0.1%	2
67663	Rooks County 76.6% Ellis County 23.4%	23.4%	2
67664	Phillips County 69.0% Norton County 31.0%	31.0%	2
67665	Russell County 93.7% Barton County 6.3%	6.3%	2
67672	Trego County 84.4% Graham County 15.6%	15.6%	2
67673	Osborne County 58.5% Russell County 41.5%	41.5%	2
67675	Rooks County 96.7% Osborne County 3.3%	3.3%	2
67701	Thomas County 87.2% Rawlins County 12.8%	12.8%	2
67732	Thomas County 50.0% Sherman County 27.3% Logan County 13.0% Rawlins County 9.7%	50.0%	4
67734	Thomas County 58.9% Rawlins County 41.1%	41.1%	2
67735	Sherman County 98.7% Cheyenne County 1.3%	1.3%	2
67737	Gove County 62.7% Sheridan County 37.3%	37.3%	2
67738	Gove County 78.5% Sheridan County 21.5%	21.5%	2
67739	Rawlins County 95.8% Decatur County 4.2%	4.2%	2
67740	Sheridan County 96.9% Graham County 3.1%	3.1%	2
67741	Sherman County 87.6% Cheyenne County 12.4%	12.4%	2
67743	Thomas County 90.2% Rawlins County 9.8%	9.8%	2
67745	Rawlins County 83.3% Cheyenne County 16.7%	16.7%	2
67747	Logan County 92.8% Thomas County 7.2%	7.2%	2
67748	Logan County 41.5% Thomas County 33.7% Gove County 23.1% Sheridan County 1.7%	58.5%	4
67749	Decatur County 93.9% Rawlins County 6.1%	6.1%	2
67751	Gove County 55.1% Sheridan County 44.9%	44.9%	2
67752	Gove County 84.7% Sheridan County 15.3%	15.3%	2
67753	Thomas County 52.7% Sheridan County 32.1% Rawlins County 15.2%	47.3%	3
67757	Sheridan County 61.1% Decatur County 38.9%	38.9%	2
67761	Wallace County 66.3% Logan County 33.7%	33.7%	2
67762	Wallace County 80.9% Greeley County 19.1%	19.1%	2
67764	Logan County 94.1% Thomas County 5.9%	5.9%	2
67801	Ford County 98.7% Hodgeman County 1.3%	1.3%	2
67834	Ford County 66.6% Clark County 27.9% Kiowa County 5.5%	33.4%	3
67835	Gray County 49.4% Finney County 42.9% Hodgeman County 7.7%	50.6%	3
67837	Haskell County 58.6% Gray County 32.6% Meade County 8.8%	41.4%	3
67838	Kearny County 85.5% Finney County 14.5%	14.5%	2
67839	Lane County 92.8% Gove County 7.2%	7.2%	2
67841	Gray County 60.9% Ford County 39.1%	39.1%	2
67842	Ford County 75.5% Clark County 24.5%	24.5%	2
67844	Meade County 82.2% Ford County 10.0% Gray County 7.8%	17.8%	3
67846	Finney County 96.2% Gray County 2.3% Lane County 1.5%	3.8%	3
67849	Hodgeman County 94.8% Ness County 5.2%	5.2%	2
67850	Lane County 59.9% Gove County 22.2% Scott County 17.9%	40.1%	3
67851	Finney County 96.1% Scott County 3.9%	3.9%	2
67853	Gray County 84.0% Finney County 16.0%	16.0%	2
67855	Stanton County 89.2% Morton County 9.7% Grant County 1.1%	10.8%	3
67857	Hamilton County 53.0% Kearny County 47.0%	47.0%	2
67861	Wichita County 93.8% Logan County 5.9% Wallace County 0.3%	6.2%	3
67862	Stanton County 74.0% Morton County 26.0%	26.0%	2
67863	Wichita County 90.7% Scott County 9.3%	9.3%	2
67865	Clark County 62.9% Ford County 37.1%	37.1%	2
67867	Gray County 84.6% Meade County 15.4%	15.4%	2
67869	Meade County 83.5% Seward County 16.5%	16.5%	2
67870	Haskell County 75.5% Seward County 13.4% Grant County 11.1%	24.6%	3
67871	Scott County 87.7% Gove County 4.9% Logan County 3.2% Finney County 3.2% Wichita County 1.0%	12.3%	5
67876	Ford County 68.7% Hodgeman County 31.3%	31.3%	2
67877	Haskell County 92.8% Seward County 7.2%	7.2%	2
67878	Hamilton County 95.7% Stanton County 4.3%	4.3%	2
67880	Grant County 80.5% Kearny County 18.0% Hamilton County 1.5%	19.5%	3
67901	Seward County 93.7% Stevens County 6.3%	6.3%	2
67952	Stevens County 73.0% Seward County 27.0%	27.0%	2
67954	Morton County 79.1% Stevens County 20.9%	20.9%	2
68325	Thayer County, NE 55.1% Republic County 44.9%	44.9%	2
68327	Thayer County, NE 65.9% Republic County 34.1%	34.1%	2
68420	Pawnee County, NE 97.6% Nemaha County 2.4%	2.4%	2
68943	Nuckolls County, NE 84.0% Republic County 11.9% Thayer County, NE 4.1%	16.0%	3
68978	Nuckolls County, NE 84.7% Jewell County 15.3%	15.3%	2
69026	Red Willow County, NE 64.3% Decatur County 35.7%	35.7%	2

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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