United States › South Dakota › Clay County COUNTY · 2000 CENSUS
Clay County South Dakota · 13,537 residents · 412 sq mi
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The short version
Clay County is a county of 13,537 people in South Dakota. The median age is 24.9, younger than the US median of 35.2. 39% of adults hold a bachelor's degree, against 24% nationally. 54% of homes are owner-occupied. 21.2% of residents live below the federal poverty line. Home values have risen by half since 1990, reaching $73,700.
At a glance
Lower income
below the US median
US median: $42,589
Younger
median age 24.9
US median: 35.2
More educated
39% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01
Population & growth from 24.0 in 1990
US average: 35.2
Population, 1990 – 2024
13K 14K 14K 15K 15K 1990 2000 2010 2020 2024 Clay County Age distribution, 2000
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $27,535
+8%inflation adjusted, since 1990
from $19,392 in 1990
US average: $42,589
from $9,160 in 1990
US average: $21,522
from 24.6% in 1990
US average: 12.4%
$73,700
+17%inflation adjusted, since 1990
from $47,800 in 1990
US average: $120,530
$440
+15%inflation adjusted, since 1990
from $291 in 1990
US average: $602
from 52.9% in 1990
45.6% rent
Section 04
Race & ethnicity 1990
White, non-Hispanic 95.2%(12,547)
Hispanic / Latino 0.8%(111)
2000
White, non-Hispanic 92.3%(12,498)
Hispanic / Latino 0.9%(120)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Detailed origin tables are available for 2024; showing 2024 data.
Ancestry
+ 21 more ancestry groups with data from 36.3% in 1990
US average: 24.4%
High school or higher
from 84.4% in 1990
US average: 80.3%
from 19.5% in 1990
US average: 8.8%
Section 06
Commute & transportation from 22.8 min in 1990
US average: 17.6
Section 07
Work & employment No data for the years selected.
Section 08
People & community No data for the years selected.
Marital status
Men 15+
Never married 45.9%(2,517)
Women 15+
Never married 38.9%(2,290)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09
Health coverage Showing 2024 (the nearest year with coverage data).
from 9.8% in 2013
US average: 8.4%
from 62.4% in 2020
US average: 54.8%
Direct-purchase
from 19.6% in 2020
US average: 13.8%
from 13.1% in 2020
US average: 18.4%
from 12.2% in 2020
US average: 20.9%
VA health care
from 3.2% in 2020
US average: 2.2%
Any private
from 80.8% in 2020
US average: 67.1%
Any public
from 23.9% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 29.8%(189)
Gulf War (1990s) 23.7%(150)
Share of the 634 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper
Places similar to Clay County Head to head
Compare Clay County to nearby counties CLAY COUNTY VS
Union County
Income $89,636 +226%
Home value $301,100 +309%
Population 17,402 +16%
SEE FULL COMPARISON →
CLAY COUNTY VS
Yankton County
Income $72,821 +164%
Home value $225,900 +207%
Population 23,635 +57%
SEE FULL COMPARISON →
CLAY COUNTY VS
Cedar County
Income $73,578 +167%
Home value $185,000 +151%
Population 8,373 −44%
SEE FULL COMPARISON →
CLAY COUNTY VS
Lincoln County
Income $99,166 +260%
Home value $348,300 +373%
Population 77,145 +413%
SEE FULL COMPARISON →
Frequently asked
How many people live in Clay County, South Dakota? Clay County, South Dakota has about 13,537 residents according to the 2000 Census.
What is the median household income in Clay County, South Dakota? The typical household in Clay County, South Dakota earns about $27,535 a year. Half of households make more than that, and half make less.
Is Clay County, South Dakota expensive? In Clay County, South Dakota, the median home is worth about $73,700, and the typical rent is about $440 a month.
How educated are people in Clay County, South Dakota? About 38.7% of adults age 25 and over in Clay County, South Dakota hold a bachelor's degree or higher.
What is the poverty rate in Clay County, South Dakota? About 21.2% of people in Clay County, South Dakota live below the federal poverty line.
Has Clay County, South Dakota grown since 1990? Yes, Clay County, South Dakota has grown since 1990. The population has added about 351 residents, a change of about 3 percent over that period.
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