Boone County | |
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![]() 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 | |
Country | ![]() |
State | ![]() |
Founded | 1798 |
Named for | Daniel Boone |
Seat | Burlington |
Largest city | Florence |
Area | |
• Total | 256 sq mi (660 km2) |
• Land | 246 sq mi (640 km2) |
• Water | 10 sq mi (30 km2) 3.9% |
Population (2020) | |
• Total | 135,968 |
• Estimate (2023) | 140,496 ![]() |
• Density | 530/sq mi (210/km2) |
Time zone | UTC−5 (Eastern) |
• Summer (DST) | UTC−4 (EDT) |
Congressional district | 4th |
Website | www |
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,[1] making it the fourth-most populous county in Kentucky. Its county seat is Burlington.[2] The county was formed in 1798 from a portion of Campbell County[3] and was named for frontiersman Daniel Boone.[4] 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.