Seminole County, Florida

Seminole County
County
Fallen Heroes Memorial at the Seminole County Criminal Justice Center
Location within the U.S. state of Florida
Florida's location within the U.S.
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 (90 km2)  10.4%
Population
 (2020)
  Total
470,856
  Estimate 
(2023)
484,271
  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.