San Leon, Texas

San Leon is a census-designated place (CDP) in Galveston County, Texas. The population was 6,135 at the 2020 census.

According to the United States Census Bureau, the CDP has a total area of 5.2 sq mi (13 km2), of which 4.9 sq mi (13 km2) is land and 0.3 sq mi (0.78 km2), or 5.61%, is covered by water.

The Bacliff, San Leon, and Bayview communities form the "Bayshore" area.

Shore erosion had affected San Leon. Avenue A was built along the north shore. By 1997, it was no longer contiguous because portions had been destroyed by erosion.

Effective August 15, 2019 Galveston County Commissioners Court approved revised Federal Emergency Management Agency flood plain maps which categorized the vast majority of San Leon as being at high risk from floods.

The most significant sector of the community's economy is oyster and shrimp fishing. Many homes in the community are second homes used as summer residences. Like Bacliff and Bayview, many residents in San Leon commute to work in Houston.