 The county seat is the City of Galveston, founded the following year of 1839, 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.The county was founded in 1838.Galveston County is part of the ten-county Houston–The Woodlands–Sugar Land (Greater Houston) metropolitan statistical area.