Seminole County, Florida

Seminole County, Florida
County
Fallen Heroes Memorial at the Seminole County Criminal Justice Center
Location within the U.S. state of Florida
Coordinates: 28°43′N 81°14′W / 28.71°N 81.23°W / 28.71; -81.23
Country United States
State Florida
FoundedApril 25, 1913
Named afterSeminole people
SeatSanford
Largest citySanford
Area
 • Total
345 sq mi (890 km2)
 • Land309 sq mi (800 km2)
 • Water36 sq mi (93 km2)  10.4%
Population
 (2020)
 • Total
470,856
 • Estimate 
(2024)
494,605
 • Density1,524/sq mi (588.6/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district7th
Websitewww.seminolecountyfl.gov

Seminole County (/ˈsɛmɪnl/, SEM-i-nohl) is a county located in the central portion of the U.S. state of Florida. As of the 2020 census, the population was 470,856, making it the 13th-most populated county in Florida. Its county seat and largest city is Sanford. Seminole County is part of the Orlando-Kissimmee-Sanford, Florida Metropolitan Statistical Area.