Map of South Dakota Counties

South Dakota is divided into 66 counties. Use the interactive maps below to explore counties and their boundaries. Download free maps or learn more about creating a custom map of South Dakota to visualize your own data.

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Interactive Map of South Dakota Counties

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List of Counties (66)

List of 66 counties
#	County	County seat	Year founded	Population (2024)	Land area (sq mi)
1	Aurora	Plankinton	1881	2,752	708.50
2	Beadle	Huron	1879	19,459	1,258.70
3	Bennett	Martin	1909	3,289	1,184.60
4	Bon Homme	Tyndall	1862	7,071	563.50
5	Brookings	Brookings	1862	36,359	792.20
6	Brown	Aberdeen	1879	37,495	1713
7	Brule	Chamberlain	1875	5,261	817.20
8	Buffalo	Gann Valley	1873	1825	471.40
9	Butte	Belle Fourche	1883	10,891	2,250
10	Campbell	Mound City	1873	1342	733.80
11	Charles Mix	Lake Andes	1862	9,343	1,097.10
12	Clark	Clark	1873	3,974	957.50
13	Clay	Vermillion	1862	15,245	412
14	Codington	Watertown	1877	29,278	687.60
15	Corson	McIntosh	1909	3,747	2,469.70
16	Custer	Custer	1875	9,330	1,556.90
17	Davison	Mitchell	1873	19,907	435.60
18	Day	Webster	1879	5,408	1,028.50
19	Deuel	Clear Lake	1862	4,335	622.70
20	Dewey	Timber Lake	1873	5,322	2,302.40
21	Douglas	Armour	1873	2,849	431.80
22	Edmunds	Ipswich	1873	4,027	1126
23	Fall River	Hot Springs	1883	7,359	1,739.90
24	Faulk	Faulkton	1873	2,136	981.70
25	Grant	Milbank	1873	7,618	681.40
26	Gregory	Burke	1862	4,110	1015
27	Haakon	Philip	1914	1834	1,810.50
28	Hamlin	Hayti	1873	6,596	507.10
29	Hand	Miller	1873	3,097	1,436.60
30	Hanson	Alexandria	1873	3,477	434.60
31	Harding	Buffalo	1909	1325	2,671.60
32	Hughes	Pierre	1880	17,526	741.50
33	Hutchinson	Olivet	1862	7,416	813
34	Hyde	Highmore	1873	1215	860.60
35	Jackson	Kadoka	1914	2,737	1,863.90
36	Jerauld	Wessington Springs	1883	1689	526.10
37	Jones	Murdo	1916	874	969.70
38	Kingsbury	De Smet	1873	5,261	832.20
39	Lake	Madison	1873	11,006	562.90
40	Lawrence	Deadwood	1875	28,809	800.10
41	Lincoln	Canton	1867	75,244	577.30
42	Lyman	Kennebec	1873	3,721	1,642.30
43	Marshall	Britton	1885	4,395	838.10
44	McCook	Salem	1873	5,771	574.20
45	McPherson	Leola	1873	2,307	1,136.70
46	Meade	Sturgis	1889	30,918	3,470.90
47	Mellette	White River	1909	1834	1,307.30
48	Miner	Howard	1873	2,303	570.20
49	Minnehaha	Sioux Falls	1862	208,639	806.90
50	Moody	Flandreau	1873	6,529	519.40
51	Oglala Lakota	Hot Springs	1875	13,360	2,093.60
52	Pennington	Rapid City	1875	115,979	2,776.80
53	Perkins	Bison	1909	2,832	2,870.50
54	Potter	Gettysburg	1875	2,402	861.10
55	Roberts	Sisseton	1883	10,283	1,101.10
56	Sanborn	Woonsocket	1883	2,392	569.20
57	Spink	Redfield	1873	6,108	1,503.50
58	Stanley	Fort Pierre	1873	3,015	1,444.40
59	Sully	Onida	1873	1468	1,006.70
60	Todd	Winner	1909	9,172	1,388.60
61	Tripp	Winner	1873	5,717	1,612.30
62	Turner	Parker	1871	9,087	617.10
63	Union	Elk Point	1862	17,402	462
64	Walworth	Selby	1873	5,270	707.50
65	Yankton	Yankton	1862	23,509	521.20
66	Ziebach	Dupree	1911	2,418	1,961.20

Data sources, all public domain:

Population: US Census Bureau, County Population Estimates (Vintage 2024).
Land area: US Census Bureau, Gazetteer Files (2026).

South Dakota Counties: Key Facts

Total number of counties: 66
Largest county by area: Meade County - 3,471 square miles (8,989 km²)
Smallest county by area: Clay County - 504 square miles (1,305 km²)
Most populous county: Minnehaha County - 208,639 residents
Least populous county: Jones County - 930 residents
Major urban centers: Sioux Falls (Minnehaha), Rapid City (Pennington)
Time zones: Central Time in eastern counties; Mountain Time in western counties
Bordering states: North Dakota, Minnesota, Iowa, Nebraska, Wyoming, Montana

Interesting Facts

Counties without an incorporated seat: Todd County and Oglala Lakota County
Cultural hubs: Pennington County contains Rapid City and is the gateway to Mount Rushmore and the Badlands
Missouri River influence: The river forms parts of several county boundaries and includes major reservoirs