Boone County, Kentucky

Boone County
The old Boone County courthouse in Burlington
Location within the U.S. state of Kentucky
Kentucky's location within the U.S.
Coordinates: 38°58′N 84°44′W / 38.97°N 84.73°W / 38.97; -84.73
Country United States
State Kentucky
Founded1798
Named afterDaniel Boone
SeatBurlington
Largest cityFlorence
Area
  Total
256 sq mi (660 km2)
  Land246 sq mi (640 km2)
  Water10 sq mi (30 km2)  3.9%
Population
 (2020)
  Total
135,968
  Estimate 
(2024)
144,135
  Density530/sq mi (210/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district4th
Websitewww.boonecountyky.org

Boone County is a county located on the Ohio River in the northernmost part of the Commonwealth of Kentucky. As of the 2020 census, the population was 135,968, making it the fourth-most populous county in Kentucky. Its county seat is Burlington. The county was formed in 1798 from a portion of Campbell County and was named for frontiersman Daniel Boone. Boone County, with Kenton and Campbell Counties, is of the Northern Kentucky metro area, and the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area. It is the location of the Cincinnati/Northern Kentucky International Airport, which serves Cincinnati and the tri-state area.