Lyon County, Kentucky

Lyon County
Lyon County Courthouse in Eddyville, Kentucky.
Location within the U.S. state of Kentucky
Kentucky's location within the U.S.
Coordinates: 37°03′32″N 88°06′49″W / 37.058964°N 88.113643°W / 37.058964; -88.113643
Country United States
State Kentucky
Founded1854
Named afterChittenden Lyon
SeatEddyville
Largest cityEddyville
Area
  Total
257 sq mi (670 km2)
  Land214 sq mi (550 km2)
  Water43 sq mi (110 km2)  17%
Population
 (2020)
  Total
8,680
  Estimate 
(2024)
9,078
  Density34/sq mi (13/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.lyoncountyky.com

Lyon County is a county located in the U.S. state of Kentucky. As of the 2020 census, the population was 8,680. Its county seat is Eddyville. The county was formed from Caldwell County, Kentucky in 1854 and named for former Congressman Chittenden Lyon.