Ellis County, Oklahoma

Ellis County
Location within the U.S. state of Oklahoma
Oklahoma's location within the U.S.
Coordinates: 36°13′N 99°45′W / 36.21°N 99.75°W / 36.21; -99.75
Country United States
State Oklahoma
Founded1907
Named afterAlbert H. Ellis
SeatArnett
Largest townShattuck
Area
  Total
1,232 sq mi (3,190 km2)
  Land1,232 sq mi (3,190 km2)
  Water0.4 sq mi (1 km2)  0.03%
Population
 (2020)
  Total
3,749
  Density3.0/sq mi (1.2/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district3rd

Ellis County is a county located on the western border of the U.S. state of Oklahoma. As of the 2020 census, the population was 3,749, making it the fifth-least populous county in Oklahoma. Its county seat is Arnett.

The county was named for Albert H. Ellis, vice president of the 1906 Constitutional Convention.