Galveston County, Texas

Galveston County
Galveston County Courts Building
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 29°23′N 94°52′W / 29.38°N 94.86°W / 29.38; -94.86
Country United States
State Texas
Founded1838
Named afterCity of Galveston
SeatGalveston
Largest cityLeague City
Area
  Total
874 sq mi (2,260 km2)
  Land378 sq mi (980 km2)
  Water495 sq mi (1,280 km2)  57%
Population
 (2020)
  Total
350,682
  Estimate 
(2024)
367,407
  Density400/sq mi (150/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district14th
Websitewww.galvestoncountytx.gov

Galveston County (/ˈɡælvɪstən/ GAL-vis-tən) is a county in the U.S. state of Texas, located along the Gulf Coast adjacent to Galveston Bay. As of the 2020 census, its population was 350,682. The county was founded in 1838. The county seat is the City of Galveston, founded the following year, and located on Galveston Island. The most-populous municipality in the county is League City, a suburb of Houston at the northern end of the county, which surpassed Galveston in population during the early 2000s.

Galveston County is part of the nine-county Houston–The Woodlands–Sugar Land (Greater Houston) metropolitan statistical area.