Lyon County, Kansas

Lyon County
Lyon County Courthouse in Emporia (2009)
Location within the U.S. state of Kansas
Kansas's location within the U.S.
Coordinates: 38°27′N 96°09′W / 38.450°N 96.150°W / 38.450; -96.150
Country United States
State Kansas
FoundedFebruary 5, 1862
Named afterNathaniel Lyon
SeatEmporia
Largest cityEmporia
Area
  Total
855 sq mi (2,210 km2)
  Land847 sq mi (2,190 km2)
  Water7.9 sq mi (20 km2)  0.9%
Population
 (2020)
  Total
32,179
  Estimate 
(2023)
32,172
  Density38.0/sq mi (14.7/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district2nd
WebsiteLyonCounty.org

Lyon County is a county located in the U.S. state of Kansas. Its county seat and largest city is Emporia. As of the 2020 census, the county population was 32,179. The county was named for Nathaniel Lyon, a general who was killed at the Battle of Wilson's Creek during the Civil War.