County · South Dakota

Clark County, South Dakota

Clark County, South Dakota. Clark County had 4,031 residents in 2025 by the Census Bureau's estimate, up 5.1% since 2020, in line with South Dakota (+5.5%). It holds 40 places (7 cities, villages and boroughs, 27 towns and townships and 6 census-designated) and 1 census tract. GEOID 46025.

Residents, July 2025 estimate

4,031

Census Bureau estimate (no margin published)
2020 Census count: 3,837 · ACS 2020-2024: 3,917

Median household income

$70,726

±$6,465 (90% margin)
South Dakota: $75,081

Median home value

$158,400

±$18,625 (90% margin)
South Dakota: $257,400

Median gross rent

$782

±$143 (90% margin)
South Dakota: $946

How many people live in Clark County, and is it growing?

The 2020 Census counted 3,837 residents in Clark County. The Census Bureau estimates 4,031 for July 1, 2025, up 5.1% since 2020, in line with South Dakota (+5.5%). The 2020-2024 American Community Survey puts the population at 3,917 over 958 square miles of land.

July 2020→2021 +24 (3,874)
2021→2022 +74 (3,948)
2022→2023 +3 (3,951)
2023→2024 +49 (4,000)
2024→2025 +31 (4,031)

Clark County in South Dakota. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Clark County	South Dakota	Change since 2015-2019
Total population	3,917	907,428	+232
Households	1,336±76	365,544	−210
Average household size	2.82±0.16	2.39	+0.49
Housing units	1,609±23	408,584	−214

Clark County's population since 2000

From 4,143 in 2000 to 4,031 in 2025: down 2.7%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 4,143
2005 (estimate) 3,827
2010 Census 3,691
2015 (estimate) 3,652
2020 Census 3,837
2025 (estimate) 4,031

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Clark County?

Clark County holds 40 places: 7 cities, villages and boroughs (incorporated places), 27 towns and townships (county subdivisions with their own government) and 6 census-designated places. The largest is Clark with 1,183 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Clark County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Clark	city	1,148	1,359±177	$58,750	$122,800	10.7%	100%
Willow LakeGEOID 4671940	city	255	433±188	$72,875	$149,000	1.2%	100%
Mount Pleasant TownshipGEOID 4602544060	township	241	0±10	not published	not published	–	100%
Collins TownshipGEOID 4602513180	township	214	203±122	$64,643	$334,400	5.6%	100%
Pleasant Township, Clark CountyGEOID 4602550340	township	194	161±71	$84,531	$431,300	27.9%	100%
Lake Township, Clark CountyGEOID 4602534820	township	177	51±35	$128,750	$328,600	0.0%	100%
Fordham TownshipGEOID 4602522060	township	154	116±126	not published	not published	95.7%	100%
Mayfield ColonyGEOID 4641548	CDP	146	77±10	not published	not published	69.6%	100%
Elrod TownshipGEOID 4602519220	township	97	84±56	$73,542	$541,700	4.8%	100%
Hillcrest ColonyGEOID 4629116	CDP	94	0±10	not published	not published	–	100%
Day TownshipGEOID 4602515580	township	94	178±124	$117,750	$345,700	0.0%	100%
Cottonwood TownshipGEOID 4602514140	township	94	10±10	not published	$231,300	0.0%	100%
Collins ColonyGEOID 4613188	CDP	92	0±10	not published	not published	–	100%
Lincoln Township, Clark CountyGEOID 4602537300	township	79	29±23	not published	not published	51.7%	100%
Washington Township, Clark CountyGEOID 4602568980	township	74	105±49	$63,333	$300,000	1.9%	100%
BradleyGEOID 4606660	town	65	78±38	$57,500	$94,200	11.5%	100%
Rosedale Township, Clark CountyGEOID 4602556020	township	65	101±61	not published	$218,300	0.0%	100%
Eden Township, Clark CountyGEOID 4602518020	township	63	28±23	not published	not published	0.0%	100%
Richland Township, Clark CountyGEOID 4602554580	township	61	52±34	$250,000 or more	$112,500	0.0%	100%
Raymond TownshipGEOID 4602553300	township	60	173±186	not published	not published	0.0%	100%
Merton TownshipGEOID 4602542060	township	55	53±40	$83,500	not published	8.1%	100%
Maydell TownshipGEOID 4602541460	township	54	0±10	not published	not published	–	100%
RaymondGEOID 4653260	town	53	82±51	$75,000	$42,800	11.0%	100%
Warren Township, Clark CountyGEOID 4602568820	township	52	16±22	not published	not published	0.0%	100%
ViennaGEOID 4667220	town	49	49±44	$43,125	not published	0.0%	100%
Woodland TownshipGEOID 4602572660	township	48	18±20	not published	not published	0.0%	100%
Darlington Township, Clark CountyGEOID 4602515500	township	43	36±30	not published	not published	0.0%	100%
Spring Valley Township, Clark CountyGEOID 4602560980	township	42	56±42	not published	not published	0.0%	100%
Hague TownshipGEOID 4602526580	township	41	46±36	not published	$172,200	23.9%	100%
Logan Township, Clark CountyGEOID 4602538220	township	41	5±8	not published	not published	0.0%	100%
NaplesGEOID 4644620	town	38	96±71	not published	$106,300	53.1%	100%
Blaine Township, Clark CountyGEOID 4602505900	township	37	83±89	not published	not published	0.0%	100%
Thorp TownshipGEOID 4602563380	township	36	80±68	$94,643	not published	0.0%	100%
Garden CityGEOID 4623460	town	33	78±59	$93,750	not published	4.0%	100%
Garfield Township, Clark CountyGEOID 4602523540	township	33	37±30	not published	not published	0.0%	100%
Foxton TownshipGEOID 4602522540	township	33	21±24	$112,917	$215,000	0.0%	100%
CrockerGEOID 4614660	CDP	19	22±27	not published	not published	0.0%	100%
Ash Township, Clark CountyGEOID 4602502500	township	14	0±10	not published	not published	–	100%
Silver Lake ColonyGEOID 4658868	CDP	7	0±10	not published	not published	–	100%
Fordham ColonyGEOID 4622070	CDP	0	0±10	not published	not published	–	100%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Clark County?

The median resident of Clark County is 40.3 years old; 29.4% are under 18 and 23.5% are 65 or older. The largest group is non-Hispanic white residents at 90.7%, then Hispanic or Latino residents (of any race) at 5.3%.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Clark County	South Dakota	Change since 2015-2019
Median age	40.3±1.1	38.0	no clear change
Under 18 years	29.4%±2.2 pts	24.2%	–
65 years and over	23.5%±0.3 pts	18.0%	–
Hispanic or Latino (any race)	5.3%	4.8%	+2.0 pts
White alone, not Hispanic	90.7%±0.5 pts	79.8%	−2.9 pts
Black or African American alone, not Hispanic	0.5%±0.8 pts	2.1%	–
Asian alone, not Hispanic	0.7%±1.1 pts	1.4%	–
American Indian and Alaska Native alone, not Hispanic	0.6%±0.7 pts	7.1%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.6 pts	0.0%	–
Two or more races, not Hispanic	1.9%±1.2 pts	4.4%	–
Some other race alone, not Hispanic	0.2%±0.3 pts	0.3%	–
Born outside the United States	2.7%±2.0 pts	4.0%	–
Speak a language other than English at home (age 5+)	6.8%±4.8 pts	7.1%	–
Civilian veterans (age 18+)	7.7%±2.0 pts	7.9%	–
With a disability	11.2%±1.9 pts	12.5%	–
No health insurance coverage	7.0%±2.4 pts	9.0%	no clear change
High school graduate or higher (age 25+)	90.6%±5.1 pts	93.2%	–
Bachelor's degree or higher (age 25+)	19.7%±4.0 pts	31.9%	no clear change
Graduate or professional degree (age 25+)	2.3%±1.4 pts	10.0%	–
Moved from another state in the past year	1.5%±1.5 pts	3.2%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Clark County earn?

Half of Clark County's 1,336 households earn less than $70,726 a year (±$6,465), against $75,081 in South Dakota. In 2015-2019 the median was $60,279 in 2024 dollars, so it rose by $10,447 after inflation. 10.9% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Clark County	South Dakota	Change since 2015-2019
Median household income	$70,726±$6,465	$75,081	+$10,447
Mean household income	$90,733±$8,924	$98,527	–
Per capita income	$34,226±$3,847	$40,550	no clear change
People below the poverty line	10.9%±4.5 pts	11.9%	no clear change
Children under 18 below the poverty line	5.6%±4.7 pts	14.3%	–
Households receiving SNAP	1.9%±0.9 pts	7.9%	–
Households with a broadband subscription	85.8%±3.0 pts	89.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Clark County?

Owners occupy 77.5% of Clark County's occupied homes and renters 22.5%. The median owner-occupied home is valued at $158,400 by its owner (±$18,625). The median renter pays $782 a month including utilities, and 20.3% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Clark County	South Dakota	Change since 2015-2019
Median home value (owner-occupied)	$158,400±$18,625	$257,400	+$32,377
Median gross rent	$782±$143	$946	no clear change
Renters paying 35% or more of income on rent	20.3%±9.4 pts	30.4%	no clear change
Median monthly owner costs, with a mortgage	$1,273±$127	$1,680	–
Owner-occupied homes	77.5%±4.3 pts	68.6%	no clear change
Housing units	1,609±23	408,584	−214
Homeowner vacancy rate	0.0%±2.4 pts	0.8%	–
Rental vacancy rate	0.0%±7.8 pts	6.0%	–
Single-family detached homes	83.7%±3.7 pts	66.9%	–
Mobile homes	8.0%±2.6 pts	7.2%	–
Built 2020 or later	1.8%±1.4 pts	2.3%	–
Built 1939 or earlier	38.0%±4.7 pts	15.8%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is Clark County building?

Builders took permits for 12 new housing units across Clark County in 2025 (12 single-family), 3.0 per 1,000 residents.

2019 8 units
2020 6 units
2021 8 units
2022 7 units
2023 8 units
2024 13 units
2025 12 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Clark County get to work?

68.8% of Clark County's workers drive alone and 17.1% work from home. The average trip to work takes 20.8 minutes. The unemployment rate in 2020-2024 averaged 4.0%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Clark County	South Dakota	Change since 2015-2019
In the labor force (age 16+)	59.4%±5.4 pts	67.2%	–
Unemployment rate	4.0%±2.6 pts	2.9%	no clear change
Drove alone to work	68.8%±7.0 pts	77.0%	–
Carpooled	11.3%±5.1 pts	8.3%	–
Public transportation	0.0%±1.6 pts	0.5%	–
Walked	2.3%±1.5 pts	3.1%	–
Worked from home	17.1%±6.7 pts	9.7%	no clear change
Mean travel time to work	20.8 min±2.4	17.8 min	no clear change

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are Clark County's census tracts?

Clark County is a single census tract.

Census tracts of Clark County, ACS 2020-2024 5-year estimates; sort by any column

Tract 955846025955800	Clark (8%)	3,837	3,917	$70,726	$158,400	$782	10.9%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Clark County compare with South Dakota's other counties?

Clark County's rank among South Dakota's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	41st of 66
Growth 2020-2025	12th of 66
Residents per square mile	42nd of 66
Median household income	37th of 66
Median home value	40th of 66
Median gross rent	27th of 65
Poverty rate	34th of 65
Bachelor's degree or higher	53rd of 66
Median age	38th of 66

Every county in South Dakota

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for Clark County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.