Martin County, Florida

Martin County
Martin County Courthouse
Location within the U.S. state of Florida
Florida's location within the U.S.
Coordinates: 27°05′N 80°24′W / 27.08°N 80.4°W / 27.08; -80.4
Country United States
State Florida
FoundedMay 30, 1925
Named afterJohn W. Martin
SeatStuart
Largest communityPalm City
Area
  Total
753 sq mi (1,950 km2)
  Land543 sq mi (1,410 km2)
  Water209 sq mi (540 km2)  27.8%
Population
 (2020)
  Total
158,431
  Estimate 
(2023)
163,315
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district21st
Websitewww.martin.fl.us

Martin County is a county located in the southeastern part of the state of Florida, in the United States. As of the 2020 census, the population was 158,431. Its county seat is Stuart. Martin County is in the Port St. Lucie, FL Metropolitan Statistical Area.