Decatur County | |
|---|---|
Bank of Oberlin (2014) | |
Location within the U.S. state of Kansas | |
Kansas's location within the U.S. | |
| Coordinates: 39°48′N 100°28′W / 39.800°N 100.467°W | |
| Country | |
| State | |
| Founded | March 20, 1873 |
| Named for | Stephen Decatur, Jr. |
| Seat | Oberlin |
| Largest city | Oberlin |
| Area | |
| • Total | 894 sq mi (2,320 km2) |
| • Land | 894 sq mi (2,320 km2) |
| • Water | 0.6 sq mi (2 km2) 0.07% |
| Population (2020) | |
| • Total | 2,764 |
| • Density | 3.1/sq mi (1.2/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Area code | 785 |
| Congressional district | 1st |
| Website | oberlinks.com |
Decatur County (county code DC) is a county in Northwest Kansas. In 2020, 2,764 people lived there. Its county seat is Oberlin. Oberlin is also the biggest city in Decatur County. The county is named after Commodore Stephen Decatur, Jr.
Decatur County was created on March 20, 1873 and organized on December 15, 1879. It is named after the Navy war hero Commodore Stephen Decatur, Jr.. He served during the First Barbary War and the Second Barbary War and the War of 1812.
Oberlin was where the last Native American (specifically the Northern Cheyenne) Raid in Kansas happened.
The U.S. Census Bureau says that the county has a total area of 894 square miles (2,320 km2). Of that, 894 square miles (2,320 km2) is land and 0.6 square miles (1.6 km2) (0.07%) is water.
| Historical population | |||
|---|---|---|---|
| Census | Pop. | %± | |
| 1880 | 4,180 | — | |
| 1890 | 8,414 | 101.3% | |
| 1900 | 9,234 | 9.7% | |
| 1910 | 8,976 | −2.8% | |
| 1920 | 8,121 | −9.5% | |
| 1930 | 8,866 | 9.2% | |
| 1940 | 7,434 | −16.2% | |
| 1950 | 6,185 | −16.8% | |
| 1960 | 5,778 | −6.6% | |
| 1970 | 4,988 | −13.7% | |
| 1980 | 4,509 | −9.6% | |
| 1990 | 4,021 | −10.8% | |
| 2000 | 3,472 | −13.7% | |
| 2010 | 2,961 | −14.7% | |
| 2020 | 2,764 | −6.7% | |
| U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2020 | |||

Decatur county is very Republican. The last time a democratic candidate won the county was in 1936 by Franklin D. Roosevelt.
| Year | Republican | Democratic | Third Parties |
|---|---|---|---|
| 2020 | 84.1% 1,260 | 14.6% 218 | 1.3% 20 |
| 2016 | 83.0% 1,210 | 12.2% 178 | 4.7% 69 |
| 2012 | 79.5% 1,218 | 17.4% 266 | 3.1% 48 |
| 2008 | 76.8% 1,189 | 22.2% 343 | 1.0% 16 |
| 2004 | 77.9% 1,355 | 20.4% 355 | 1.7% 30 |
| 2000 | 71.4% 1,255 | 24.1% 424 | 4.6% 80 |
| 1996 | 68.1% 1,255 | 22.6% 417 | 9.3% 172 |
| 1992 | 45.0% 940 | 27.6% 576 | 27.4% 573 |
| 1988 | 60.1% 1,291 | 36.9% 793 | 3.0% 64 |
| 1984 | 78.2% 1,770 | 20.6% 467 | 1.2% 28 |
| 1980 | 73.0% 1,642 | 19.7% 443 | 7.3% 165 |
| 1976 | 52.7% 1,232 | 43.3% 1,011 | 4.0% 93 |
| 1972 | 70.2% 1,707 | 25.3% 616 | 4.4% 108 |
| 1968 | 65.7% 1,654 | 25.9% 652 | 8.4% 210 |
| 1964 | 51.0% 1,382 | 48.5% 1,314 | 0.6% 16 |
| 1960 | 63.8% 1,846 | 35.9% 1,038 | 0.3% 8 |
| 1956 | 68.6% 2,028 | 31.1% 920 | 0.3% 9 |
| 1952 | 74.5% 2,451 | 25.0% 821 | 0.5% 16 |
| 1948 | 51.4% 1,545 | 46.7% 1,402 | 1.9% 58 |
| 1944 | 59.9% 1,758 | 39.5% 1,159 | 0.6% 17 |
| 1940 | 56.2% 2,018 | 43.0% 1,546 | 0.8% 29 |
| 1936 | 42.1% 1,727 | 57.6% 2,362 | 0.4% 15 |
| 1932 | 36.3% 1,439 | 61.0% 2,422 | 2.7% 108 |
| 1928 | 66.5% 2,314 | 32.5% 1,129 | 1.0% 35 |
| 1924 | 46.9% 1,621 | 35.2% 1,218 | 17.9% 618 |
| 1920 | 51.6% 1,448 | 43.5% 1,221 | 5.0% 140 |
| 1916 | 27.7% 1,007 | 67.0% 2,431 | 5.3% 193 |
| 1912 | 14.9% 256 | 55.5% 955 | 29.6% 509 |
| 1908 | 39.3% 898 | 54.8% 1,250 | 5.9% 135 |
| 1904 | 59.7% 1,215 | 20.2% 411 | 20.1% 409 |
| 1900 | 41.8% 848 | 57.0% 1,158 | 1.2% 24 |
| 1896 | 36.4% 594 | 63.2% 1,032 | 0.4% 7 |
| 1892 | 38.6% 619 | 61.4% 985 | |
| 1888 | 57.4% 1,224 | 34.3% 731 | 8.3% 177 |
