ZIP codes and county lines in South Dakota

229 of the 401 ZIP code areas in South Dakota, or 57.1%, 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: 401
In more than one county: 229
At least 5% in a second county: 183
Cross a state line: 41

How South Dakota compares

South Dakota ranks 1 of 52 (the 50 states, DC and Puerto Rico) by the share of its ZIP code areas that overlap more than one county. 66 of its counties have at least one split ZIP code area along an edge. 41 of its ZIP code areas also reach into Iowa, Minnesota, Montana, North Dakota, Nebraska and Wyoming, so a ZIP list that is meant to stop at the state line does not.

Counties with the most split ZIP code areas

Pennington County: 17 ZIP codes shared with another county
Meade County: 14 ZIP codes shared with another county
Turner County: 13 ZIP codes shared with another county
Hutchinson County: 12 ZIP codes shared with another county
Lake County: 12 ZIP codes shared with another county

Every split ZIP code area in South Dakota

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
51001	Plymouth County, IA 60.2% Union County 39.8%	39.8%	2
51023	Sioux County, IA 70.2% Union County 29.8%	29.8%	2
56136	Lincoln County, MN 78.9% Brookings County 21.1%	21.1%	2
56144	Rock County, MN 48.1% Pipestone County, MN 38.8% Moody County 13.1%	51.9%	3
56164	Pipestone County, MN 87.3% Lincoln County, MN 9.3% Moody County 3.4%	12.7%	3
56219	Roberts County 55.2% Traverse County, MN 36.1% Big Stone County, MN 8.7%	44.8%	3
56220	Yellow Medicine County, MN 68.1% Lac qui Parle County, MN 19.3% Lincoln County, MN 12.3% Deuel County 0.2%	31.9%	4
56257	Lac qui Parle County, MN 95.0% Deuel County 5.0%	5.0%	2
57001	Union County 93.4% Lincoln County 6.6%	6.6%	2
57002	Brookings County 92.4% Moody County 7.6%	7.6%	2
57004	Lincoln County 47.0% Union County 26.6% Clay County 26.5%	53.0%	3
57006	Brookings County 89.0% Moody County 11.0%	11.0%	2
57010	Clay County 68.9% Union County 31.1%	31.1%	2
57014	Turner County 42.5% Clay County 33.0% Lincoln County 24.5%	57.5%	3
57015	Turner County 98.0% Minnehaha County 2.0%	2.0%	2
57017	Moody County 99.1% Lake County 0.9%	0.9%	2
57018	Minnehaha County 96.5% Lake County 3.5%	3.5%	2
57022	Minnehaha County 51.2% Moody County 46.0% Lake County 2.8%	48.8%	3
57026	Brookings County 56.8% Moody County 20.0% Lincoln County, MN 13.6% Pipestone County, MN 9.7%	43.2%	4
57029	Hutchinson County 76.7% Turner County 23.3%	23.3%	2
57030	Minnehaha County 89.9% Rock County, MN 10.1%	10.1%	2
57031	Yankton County 76.7% Clay County 23.3%	23.3%	2
57034	Lincoln County 83.6% Union County 8.7% Sioux County, IA 7.7%	16.4%	3
57035	Minnehaha County 92.3% McCook County 7.7%	7.7%	2
57037	Yankton County 82.1% Turner County 11.1% Clay County 6.8%	17.9%	3
57039	Lincoln County 92.1% Turner County 7.9%	7.9%	2
57040	Yankton County 96.6% Bon Homme County 3.4%	3.4%	2
57042	Lake County 99.2% McCook County 0.8%	0.8%	2
57043	Turner County 85.5% McCook County 11.1% Hutchinson County 3.4%	14.5%	3
57045	Hutchinson County 69.3% Yankton County 28.5% Turner County 2.2%	30.7%	3
57047	McCook County 77.0% Turner County 23.0%	23.0%	2
57048	McCook County 90.2% Minnehaha County 9.8%	9.8%	2
57051	Kingsbury County 77.7% Miner County 17.6% Lake County 4.6%	22.3%	3
57053	Turner County 92.0% McCook County 5.8% Minnehaha County 2.1%	8.0%	3
57054	Lake County 99.1% Miner County 0.9%	0.9%	2
57057	Lake County 94.0% Moody County 6.0%	6.0%	2
57058	McCook County 95.6% Lake County 2.5% Miner County 1.9%	4.4%	3
57059	Bon Homme County 78.4% Hutchinson County 21.6%	21.6%	2
57063	Bon Homme County 77.7% Yankton County 22.3%	22.3%	2
57064	Lincoln County 85.7% Turner County 14.3%	14.3%	2
57068	Minnehaha County 93.2% Rock County, MN 6.8%	6.8%	2
57070	Turner County 88.1% Yankton County 11.9%	11.9%	2
57071	Brookings County 91.9% Lake County 6.5% Moody County 1.6%	8.1%	3
57072	Yankton County 72.0% Clay County 27.9%	27.9%	2
57073	Clay County 95.6% Turner County 4.4%	4.4%	2
57075	Lake County 97.6% Moody County 2.4%	2.4%	2
57076	Lake County 53.4% Miner County 46.6%	46.6%	2
57106	Minnehaha County 66.6% Lincoln County 33.4%	33.4%	2
57108	Lincoln County 98.7% Minnehaha County 1.3%	1.3%	2
57201	Codington County 99.1% Hamlin County 0.9%	0.9%	2
57212	Kingsbury County 55.6% Brookings County 43.1% Lake County 0.9% Hamlin County 0.5%	44.4%	4
57213	Deuel County 75.2% Brookings County 24.8%	24.8%	2
57216	Grant County 66.6% Roberts County 33.4%	33.4%	2
57221	Hamlin County 73.3% Clark County 26.7%	26.7%	2
57223	Hamlin County 97.6% Deuel County 2.4%	2.4%	2
57226	Deuel County 96.3% Hamlin County 3.7%	3.7%	2
57227	Roberts County 92.8% Grant County 7.2%	7.2%	2
57234	Deuel County 50.2% Hamlin County 43.5% Brookings County 6.3%	49.8%	3
57235	Codington County 94.8% Day County 5.2%	5.2%	2
57238	Deuel County 63.3% Codington County 31.9% Hamlin County 4.8%	36.7%	3
57242	Hamlin County 79.7% Codington County 20.3%	20.3%	2
57243	Codington County 87.0% Clark County 11.4% Hamlin County 1.6%	13.0%	3
57248	Hamlin County 81.4% Kingsbury County 18.6%	18.6%	2
57252	Grant County 96.4% Roberts County 3.6%	3.6%	2
57255	Roberts County 95.5% Richland County, ND 4.5%	4.5%	2
57256	Grant County 62.3% Roberts County 20.0% Day County 13.0% Codington County 4.7%	37.7%	4
57258	Clark County 93.4% Spink County 6.6%	6.6%	2
57259	Grant County 61.3% Deuel County 38.7%	38.7%	2
57262	Roberts County 92.0% Marshall County 8.0%	8.0%	2
57263	Codington County 65.6% Grant County 34.4%	34.4%	2
57265	Grant County 59.9% Deuel County 36.5% Codington County 3.6%	40.1%	3
57266	Grant County 52.2% Roberts County 47.8%	47.8%	2
57268	Deuel County 77.9% Brookings County 22.1%	22.1%	2
57270	Marshall County 86.6% Roberts County 13.4%	13.4%	2
57271	Clark County 83.0% Hamlin County 17.0%	17.0%	2
57272	Codington County 61.5% Clark County 38.5%	38.5%	2
57273	Day County 74.9% Roberts County 25.1%	25.1%	2
57274	Day County 92.7% Clark County 7.3%	7.3%	2
57301	Davison County 77.4% Hanson County 22.6%	22.6%	2
57311	Hanson County 99.0% Hutchinson County 1.0%	1.0%	2
57312	Beadle County 54.5% Jerauld County 42.4% Sanborn County 3.1%	45.5%	3
57313	Douglas County 65.8% Charles Mix County 34.3%	34.3%	2
57315	Bon Homme County 96.0% Charles Mix County 4.0%	4.0%	2
57319	McCook County 70.8% Hutchinson County 25.8% Turner County 3.4%	29.2%	3
57321	Miner County 76.3% McCook County 17.1% Hanson County 6.7%	23.7%	3
57322	Beadle County 43.7% Clark County 36.1% Spink County 20.2%	56.3%	3
57323	Miner County 73.9% Kingsbury County 22.8% Sanborn County 3.3%	26.1%	3
57325	Brule County 64.2% Buffalo County 35.8%	35.8%	2
57328	Douglas County 97.6% Aurora County 2.4%	2.4%	2
57330	Douglas County 60.7% Charles Mix County 25.9% Hutchinson County 13.4%	39.3%	3
57331	Hutchinson County 65.8% Douglas County 23.3% Davison County 10.9%	34.2%	3
57332	Hanson County 51.2% Hutchinson County 32.6% McCook County 16.2%	48.8%	3
57334	Davison County 51.6% Hanson County 35.7% Hutchinson County 12.7%	48.4%	3
57337	Miner County 94.5% Sanborn County 5.5%	5.5%	2
57340	Hanson County 84.7% Miner County 15.3%	15.3%	2
57341	Buffalo County 96.2% Brule County 3.8%	3.8%	2
57348	Beadle County 58.4% Spink County 41.6%	41.6%	2
57350	Beadle County 99.2% Sanborn County 0.8%	0.8%	2
57353	Kingsbury County 55.7% Beadle County 41.3% Clark County 3.0%	44.3%	3
57355	Brule County 88.9% Jerauld County 7.0% Buffalo County 4.0%	11.1%	3
57359	Sanborn County 76.2% Aurora County 14.9% Davison County 8.9%	23.8%	3
57362	Hand County 96.9% Buffalo County 3.1%	3.1%	2
57363	Davison County 91.3% Sanborn County 6.3% Aurora County 2.5%	8.7%	3
57366	Hutchinson County 88.9% Douglas County 11.1%	11.1%	2
57369	Charles Mix County 73.8% Brule County 23.0% Douglas County 2.2% Aurora County 1.0%	26.2%	4
57370	Brule County 78.2% Buffalo County 21.8%	21.8%	2
57371	Hand County 97.5% Hyde County 2.5%	2.5%	2
57374	McCook County 54.3% Hanson County 45.7%	45.7%	2
57375	Aurora County 98.6% Davison County 1.4%	1.4%	2
57376	Hutchinson County 78.1% Bon Homme County 21.9%	21.9%	2
57381	Hand County 61.3% Beadle County 38.7%	38.7%	2
57382	Jerauld County 84.9% Aurora County 11.8% Beadle County 3.3%	15.1%	3
57383	Aurora County 95.5% Brule County 4.5%	4.5%	2
57385	Sanborn County 66.0% Jerauld County 30.2% Aurora County 3.8%	34.0%	3
57422	Day County 95.5% Brown County 4.5%	4.5%	2
57424	Spink County 93.1% Faulk County 6.9%	6.9%	2
57428	Edmunds County 62.9% Walworth County 37.1%	37.1%	2
57430	Marshall County 99.1% Sargent County, ND 0.9%	0.9%	2
57432	Brown County 76.2% Marshall County 23.8%	23.8%	2
57434	Spink County 56.4% Clark County 17.5% Brown County 17.4% Day County 8.7%	43.6%	4
57435	Faulk County 76.5% Edmunds County 23.5%	23.5%	2
57437	McPherson County 69.1% Campbell County 30.9%	30.9%	2
57442	Potter County 84.1% Dewey County 13.8% Sully County 2.1%	15.9%	3
57448	McPherson County 58.5% Edmunds County 41.5%	41.5%	2
57450	Potter County 65.1% Walworth County 34.9%	34.9%	2
57451	Edmunds County 92.5% Brown County 7.5%	7.5%	2
57452	Walworth County 70.9% Campbell County 29.1%	29.1%	2
57454	Marshall County 69.7% Day County 30.3%	30.3%	2
57456	McPherson County 97.2% Edmunds County 2.8%	2.8%	2
57460	Brown County 59.0% Edmunds County 20.1% Spink County 11.1% Faulk County 9.7%	41.0%	4
57461	Spink County 98.2% Brown County 1.8%	1.8%	2
57465	Spink County 61.0% Faulk County 39.0%	39.0%	2
57466	Faulk County 76.3% Edmunds County 23.7%	23.7%	2
57467	Hand County 90.1% Faulk County 9.9%	9.9%	2
57469	Spink County 77.0% Hand County 17.1% Faulk County 5.9%	23.0%	3
57470	Hand County 59.9% Faulk County 40.1%	40.1%	2
57471	Edmunds County 96.2% McPherson County 3.8%	3.8%	2
57472	Walworth County 99.5% Campbell County 0.5%	0.5%	2
57473	Faulk County 81.6% Potter County 18.4%	18.4%	2
57474	Brown County 82.2% Spink County 17.8%	17.8%	2
57475	Potter County 52.1% Edmunds County 47.9%	47.9%	2
57476	Spink County 75.7% Hand County 24.3%	24.3%	2
57481	Brown County 56.5% McPherson County 31.3% Edmunds County 12.3%	43.5%	3
57501	Hughes County 58.2% Sully County 41.8%	41.8%	2
57521	Mellette County 50.3% Jackson County 49.7%	49.7%	2
57522	Hughes County 69.2% Sully County 30.8%	30.8%	2
57529	Tripp County 70.2% Gregory County 29.8%	29.8%	2
57531	Jones County 98.0% Stanley County 2.0%	2.0%	2
57532	Stanley County 84.7% Lyman County 15.3%	15.3%	2
57533	Gregory County 72.4% Lyman County 26.5% Tripp County 1.1%	27.6%	3
57534	Tripp County 79.6% Lyman County 20.4%	20.4%	2
57536	Hughes County 71.3% Sully County 28.7%	28.7%	2
57537	Stanley County 84.1% Haakon County 15.9%	15.9%	2
57544	Lyman County 93.9% Tripp County 6.1%	6.1%	2
57552	Haakon County 71.4% Stanley County 14.6% Jones County 10.3% Jackson County 3.6%	28.6%	4
57559	Jones County 99.2% Mellette County 0.8%	0.8%	2
57560	Mellette County 56.2% Bennett County 25.0% Jackson County 18.8%	43.8%	3
57564	Sully County 97.7% Hyde County 2.3%	2.3%	2
57566	Todd County 90.8% Mellette County 9.3%	9.3%	2
57567	Haakon County 73.9% Jackson County 26.1%	26.1%	2
57576	Lyman County 91.3% Jones County 8.7%	8.7%	2
57577	Jackson County 96.1% Bennett County 3.9%	3.9%	2
57580	Tripp County 79.6% Todd County 17.1% Mellette County 3.2%	20.4%	3
57601	Dewey County 85.3% Corson County 8.9% Walworth County 5.7%	14.7%	3
57625	Dewey County 77.4% Ziebach County 22.6%	22.6%	2
57626	Perkins County 39.1% Meade County 32.9% Ziebach County 28.0%	60.9%	3
57631	Walworth County 52.0% Campbell County 48.0%	48.0%	2
57633	Corson County 44.3% Ziebach County 34.5% Dewey County 21.2%	55.7%	3
57638	Perkins County 60.2% Adams County, ND 25.3% Grant County, ND 5.1% Sioux County, ND 4.7% Corson County 4.7%	39.8%	5
57641	Corson County 62.4% Sioux County, ND 27.8% Grant County, ND 9.7%	37.6%	3
57642	Corson County 97.0% Sioux County, ND 3.0%	3.0%	2
57644	Perkins County 63.3% Corson County 20.8% Ziebach County 16.0%	36.8%	3
57645	Corson County 51.9% Grant County, ND 26.8% Sioux County, ND 21.3%	48.1%	3
57648	Emmons County, ND 51.1% Campbell County 48.9%	48.9%	2
57649	Perkins County 75.7% Harding County 24.4%	24.4%	2
57651	Harding County 85.0% Perkins County 15.0%	15.0%	2
57656	Dewey County 63.6% Corson County 36.4%	36.4%	2
57657	Corson County 77.6% Dewey County 22.4%	22.4%	2
57660	Corson County 88.0% Sioux County, ND 12.0%	12.0%	2
57701	Pennington County 64.3% Meade County 35.7%	35.7%	2
57702	Pennington County 94.3% Meade County 5.7%	5.7%	2
57706	Meade County 93.4% Pennington County 6.6%	6.6%	2
57714	Bennett County 93.0% Jackson County 7.0%	7.0%	2
57716	Oglala Lakota County 92.2% Bennett County 7.8%	7.8%	2
57717	Butte County 65.5% Crook County, WY 15.2% Carter County, MT 10.2% Harding County 8.6% Lawrence County 0.6%	34.5%	5
57718	Meade County 98.7% Pennington County 1.3%	1.3%	2
57719	Meade County 76.5% Pennington County 23.5%	23.5%	2
57722	Oglala Lakota County 54.5% Custer County 31.2% Fall River County 14.3%	45.5%	3
57724	Harding County 62.6% Carter County, MT 37.4%	37.4%	2
57730	Custer County 91.7% Pennington County 8.3%	8.3%	2
57732	Lawrence County 89.8% Pennington County 10.2%	10.2%	2
57735	Fall River County 77.4% Custer County 20.7% Sioux County, NE 1.9%	22.6%	3
57744	Custer County 63.6% Pennington County 21.5% Oglala Lakota County 14.9%	36.4%	3
57747	Fall River County 72.9% Custer County 27.1%	27.1%	2
57748	Meade County 55.6% Ziebach County 44.4%	44.4%	2
57750	Jackson County 98.0% Pennington County 1.9%	1.9%	2
57751	Pennington County 66.6% Custer County 33.4%	33.4%	2
57752	Oglala Lakota County 82.8% Jackson County 13.9% Bennett County 3.3%	17.2%	3
57758	Meade County 63.3% Butte County 18.8% Perkins County 17.8%	36.7%	3
57760	Butte County 98.2% Harding County 1.8%	1.8%	2
57761	Meade County 66.7% Pennington County 33.3%	33.3%	2
57767	Meade County 50.6% Pennington County 49.4%	49.4%	2
57775	Pennington County 45.6% Haakon County 40.3% Jackson County 14.1%	54.4%	3
57779	Lawrence County 96.3% Butte County 3.7%	3.7%	2
57780	Pennington County 91.1% Oglala Lakota County 8.9%	8.9%	2
57783	Lawrence County 96.3% Butte County 3.7%	3.7%	2
57785	Meade County 94.1% Lawrence County 5.9%	5.9%	2
57788	Butte County 59.0% Meade County 41.0%	41.0%	2
57790	Pennington County 98.1% Jackson County 1.9%	1.9%	2
57791	Meade County 70.5% Pennington County 29.5%	29.5%	2
57793	Lawrence County 54.3% Meade County 38.5% Butte County 7.2%	45.7%	3
58041	Richland County, ND 99.2% Roberts County 0.8%	0.8%	2
58043	Sargent County, ND 95.1% Marshall County 4.9%	4.9%	2
58053	Richland County, ND 71.1% Sargent County, ND 20.9% Roberts County 5.9% Marshall County 2.0%	28.9%	4
58413	McIntosh County, ND 85.2% Dickey County, ND 8.1% McPherson County 6.8%	14.8%	3
58436	Dickey County, ND 95.4% Brown County 4.6%	4.6%	2
58439	Dickey County, ND 62.8% McPherson County 35.1% Brown County 2.1%	37.2%	3
58568	Sioux County, ND 99.6% Corson County 0.4%	0.4%	2
58623	Bowman County, ND 72.7% Slope County, ND 25.4% Harding County 1.9%	27.3%	3
58639	Adams County, ND 78.8% Perkins County 21.2%	21.2%	2
58649	Adams County, ND 72.7% Hettinger County, ND 11.1% Harding County 9.4% Bowman County, ND 4.7% Slope County, ND 2.1%	27.3%	5
58653	Bowman County, ND 71.1% Harding County 14.8% Slope County, ND 14.2%	28.9%	3
68719	Boyd County, NE 61.1% Gregory County 38.9%	38.9%	2
68755	Boyd County, NE 99.6% Gregory County 0.4%	0.4%	2
69201	Cherry County, NE 83.1% Todd County 16.9%	16.9%	2
69212	Cherry County, NE 57.1% Todd County 42.9%	42.9%	2
69216	Cherry County, NE 70.9% Todd County 29.1%	29.1%	2
69337	Dawes County, NE 79.0% Oglala Lakota County 11.4% Sheridan County, NE 6.5% Fall River County 3.1%	21.0%	4
82701	Weston County, WY 76.6% Niobrara County, WY 9.4% Campbell County, WY 6.2% Custer County 4.4% Pennington County 3.5%	23.4%	5

What to do with this

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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.

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