Tripp County, South Dakota

Tripp County
County
Tripp County courthouse in Winner
Location within the U.S. state of South Dakota
South Dakota's location within the U.S.
Coordinates: 43°20′N 99°53′W / 43.34°N 99.88°W / 43.34; -99.88
Country	United States
State	South Dakota
Founded	1873 (created) 1909 (organized)
Named for	Bartlett Tripp
Seat	Winner
Largest city	Winner
Area
• Total	1,618 sq mi (4,190 km2)
• Land	1,612 sq mi (4,180 km2)
• Water	5.1 sq mi (13 km2)  0.3%
Population  (2020)
• Total	5,624
• Estimate  (2023)	5,621
• Density	3.5/sq mi (1.3/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	At-large
Website	trippcounty.us

Tripp County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 5,624.^[1] Its county seat is Winner.^[2] The county was created in 1873, and was organized in 1909.^[3] It is named for lawyer, judge, and diplomat Bartlett Tripp.

Tripp County lies on the south line of South Dakota. Its south boundary is the Nebraska state line, while its north boundary is the meandering White River. The Keya Paha River flows east-southeasterly through the lower part of the county. The county terrain is composed of rolling hills carved by gullies and drainages.^[4] The county terrain generally slopes to the south and east, although its upper portion drops northward into the White River valley. The county's highest point is on the lower part of its west boundary line, at 2,552 ft (778 m) ASL.^[5] The county has a total area of 1,618 square miles (4,190 km²), of which 1,612 square miles (4,180 km²) is land and 5.1 square miles (13 km²) (0.3%) is water.^[6]

• Beaulieu Lake State Game Production Area
• Brown State Game Production Area
• Covey Dam State Game Production Area
• Dog Ear Lake State Game Production Area
• George & Katherine Mann State Game Production Area
• Ideal Wetland State Game Production Area
• King Dam State Game Production Area
• Little Dog Ear Lake State Game Production Area
• McLaughlin State Game Production Area
• Rahm Lake State Game Production Area
• Roosevelt Lake State Game Production Area
• Snow Dam State Game Production Area

• Roosevelt Lake

As of the 2020 census, there were 5,624 people, 2,233 households, and 1,398 families residing in the county.^[12] The population density was 3.5 inhabitants per square mile (1.4/km²). There were 2,762 housing units.

As of the 2010 census, there were 5,644 people, 2,419 households, and 1,509 families in the county. The population density was 3.5 inhabitants per square mile (1.4/km²). There were 3,072 housing units at an average density of 1.9 per square mile (0.73/km²). The racial makeup of the county was 83.1% white, 14.0% American Indian, 0.2% Asian, 0.1% black or African American, 0.2% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population. In terms of ancestry, 46.8% were German, 10.8% were Irish, 7.7% were Czech, 6.2% were Dutch, and 4.0% were American.

Of the 2,419 households, 26.9% had children under the age of 18 living with them, 50.4% were married couples living together, 8.4% had a female householder with no husband present, 37.6% were non-families, and 34.6% of all households were made up of individuals. The average household size was 2.28 and the average family size was 2.93. The median age was 45.3 years.

The median income for a household in the county was $40,221 and the median income for a family was $49,570. Males had a median income of $35,238 versus $25,323 for females. The per capita income for the county was $21,192. About 12.1% of families and 16.5% of the population were below the poverty line, including 27.4% of those under age 18 and 10.3% of those age 65 or over.

• Colome
• Winner (county seat)

• New Witten (called "Witten" by the U.S. Post Office)

• Hamill (Population:14)
• Ideal (Population:86)

The county contains one area of unorganized territory: Gassman.

Tripp County voters have traditionally voted Republican. In no national election since 1964 has the county selected the Democratic Party candidate (as of 2024). The Democratic Party has not obtained forty percent of the county's vote since Jimmy Carter in 1976.

• National Register of Historic Places listings in Tripp County, South Dakota

43°20′N 99°53′W / 43.34°N 99.88°W / 43.34; -99.88