Walworth County
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Location within the U.S. state of South Dakota
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South Dakota's location within the U.S.
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| Coordinates: 45°26′N 100°02′W / 45.43°N 100.03°W / 45.43; -100.03 | |
| Country |  United States |
| State |  South Dakota |
| Founded | 1873 (created) 1883 (organized) |
| Named for | Walworth County, Wisconsin |
| Seat | Selby |
| Largest city | Mobridge |
| Area | |
| • Total | 745 sq mi (1,930 km2) |
| • Land | 709 sq mi (1,840 km2) |
| • Water | 36 sq mi (90 km2) 4.8% |
| Population
(2020)
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| • Total | 5,315 |
| • Estimate
(2023)
| 5,269  |
| • Density | 7.1/sq mi (2.8/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | At-large |
| Website | walworthco |
Walworth County is a county in the U.S. stateofSouth Dakota. As of the 2020 census, the population was 5,315.[1] Its county seatisSelby.[2] The county was created in 1873 and organized in 1883.[3] It is named for Walworth County, Wisconsin.[4]
flows southward along the county's west boundary line. Swan Creek flows west-northwest through the county's SW corner, discharging into the Missouri. The county's terrain consists of semi-arid rolling hills, carved by drainages and gullies. Most of the area is devoted to agriculture.[5] The terrain slopes to the south and east, although the western portion of the county drops westward into the Missouri River valley. The county's highest point is on the eastern portion of its north boundary line, at 1,982 ft (604 m) ASL.[6] The county has a total area of 745 square miles (1,930 km2), of which 709 square miles (1,840 km2) is land and 36 square miles (93 km2) (4.8%) is water.[7]
The eastern portion of South Dakota's counties (48 of 66) observe Central Time; the western counties (18 of 66) observe Mountain Time. Walworth County is the westernmost of the SD counties to observe Central Time.[8]
U.S. Highway 83
South Dakota Highway 20
South Dakota Highway 47
South Dakota Highway 130
South Dakota Highway 144
South Dakota Highway 271
South Dakota Highway 1804| Census | Pop. | Note | %± |
|---|---|---|---|
| 1880 | 46 | — | |
| 1890 | 2,153 | 4,580.4% | |
| 1900 | 3,839 | 78.3% | |
| 1910 | 6,488 | 69.0% | |
| 1920 | 8,447 | 30.2% | |
| 1930 | 8,791 | 4.1% | |
| 1940 | 7,274 | −17.3% | |
| 1950 | 7,648 | 5.1% | |
| 1960 | 8,097 | 5.9% | |
| 1970 | 7,842 | −3.1% | |
| 1980 | 7,011 | −10.6% | |
| 1990 | 6,087 | −13.2% | |
| 2000 | 5,974 | −1.9% | |
| 2010 | 5,438 | −9.0% | |
| 2020 | 5,315 | −2.3% | |
| 2023 (est.) | 5,269 | [9] | −0.9% |
| U.S. Decennial Census[10] 1790-1960[11] 1900-1990[12] 1990-2000[13] 2010-2020[1] | |||
As of the 2020 census, there were 5,315 people, 2,271 households, and 1,400 families in the county.[14] The population density was 7.5 inhabitants per square mile (2.9/km2). There were 2,927 housing units.
As of the 2010 census, there were 5,438 people, 2,392 households, and 1,490 families in the county. The population density was 7.7 inhabitants per square mile (3.0/km2). There were 3,003 housing units at an average density of 4.2 units per square mile (1.6 units/km2). The racial makeup of the county was 82.6% white, 14.3% American Indian, 0.2% Asian, 0.1% black or African American, 0.2% from other races, and 2.6% from two or more races. Those of Hispanic or Latino origin made up 0.7% of the population. In terms of ancestry, 56.9% were German, 12.5% were Norwegian, 8.9% were Russian, 5.4% were Irish, and 3.1% were American.
Of the 2,392 households, 25.9% had children under the age of 18 living with them, 49.2% were married couples living together, 8.9% had a female householder with no husband present, 37.7% were non-families, and 32.8% of all households were made up of individuals. The average household size was 2.21 and the average family size was 2.79. The median age was 47.2 years.
The median income for a household in the county was $39,517 and the median income for a family was $51,250. Males had a median income of $37,857 versus $21,551 for females. The per capita income for the county was $23,716. About 7.5% of families and 14.5% of the population were below the poverty line, including 23.6% of those under age 18 and 14.4% of those age 65 or over.
Walworth County voters have been reliably Republican for decades. Only three Democratic presidential candidates have ever carried the county: William Jennings Bryan in 1896, Franklin D. Roosevelt in 1932 and 1936, and Lyndon Johnson in 1964.
| Year | Republican | Democratic | Third party | |||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| 2020 | 1,966 | 76.20% | 565 | 21.90% | 49 | 1.90% |
| 2016 | 1,896 | 76.54% | 457 | 18.45% | 124 | 5.01% |
| 2012 | 1,731 | 70.31% | 671 | 27.25% | 60 | 2.44% |
| 2008 | 1,668 | 62.94% | 923 | 34.83% | 59 | 2.23% |
| 2004 | 1,967 | 68.30% | 878 | 30.49% | 35 | 1.22% |
| 2000 | 1,758 | 68.86% | 721 | 28.24% | 74 | 2.90% |
| 1996 | 1,461 | 52.38% | 939 | 33.67% | 389 | 13.95% |
| 1992 | 1,439 | 49.48% | 829 | 28.51% | 640 | 22.01% |
| 1988 | 1,940 | 63.40% | 1,094 | 35.75% | 26 | 0.85% |
| 1984 | 2,396 | 75.02% | 779 | 24.39% | 19 | 0.59% |
| 1980 | 2,675 | 74.55% | 753 | 20.99% | 160 | 4.46% |
| 1976 | 2,187 | 58.66% | 1,516 | 40.67% | 25 | 0.67% |
| 1972 | 2,416 | 65.10% | 1,287 | 34.68% | 8 | 0.22% |
| 1968 | 2,204 | 60.19% | 1,276 | 34.84% | 182 | 4.97% |
| 1964 | 1,849 | 48.65% | 1,952 | 51.35% | 0 | 0.00% |
| 1960 | 2,406 | 62.11% | 1,468 | 37.89% | 0 | 0.00% |
| 1956 | 2,132 | 60.21% | 1,409 | 39.79% | 0 | 0.00% |
| 1952 | 2,369 | 65.24% | 1,262 | 34.76% | 0 | 0.00% |
| 1948 | 1,607 | 50.94% | 1,513 | 47.96% | 35 | 1.11% |
| 1944 | 1,533 | 55.64% | 1,222 | 44.36% | 0 | 0.00% |
| 1940 | 1,921 | 55.11% | 1,565 | 44.89% | 0 | 0.00% |
| 1936 | 1,420 | 38.73% | 2,212 | 60.34% | 34 | 0.93% |
| 1932 | 1,049 | 31.60% | 2,221 | 66.90% | 50 | 1.51% |
| 1928 | 1,854 | 59.96% | 1,216 | 39.33% | 22 | 0.71% |
| 1924 | 1,033 | 44.15% | 114 | 4.87% | 1,193 | 50.98% |
| 1920 | 1,411 | 61.40% | 478 | 20.80% | 409 | 17.80% |
| 1916 | 761 | 55.03% | 590 | 42.66% | 32 | 2.31% |
| 1912 | 0 | 0.00% | 451 | 40.23% | 670 | 59.77% |
| 1908 | 825 | 67.96% | 351 | 28.91% | 38 | 3.13% |
| 1904 | 654 | 76.05% | 176 | 20.47% | 30 | 3.49% |
| 1900 | 478 | 61.92% | 282 | 36.53% | 12 | 1.55% |
| 1896 | 250 | 46.21% | 286 | 52.87% | 5 | 0.92% |
| 1892 | 187 | 44.21% | 45 | 10.64% | 191 | 45.15% |
45°26′N 100°02′W / 45.43°N 100.03°W / 45.43; -100.03
Places adjacent to Walworth County, South Dakota
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Municipalities and communities of Walworth County, South Dakota, United States
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