High Island is an Unincorporated community located in the Bolivar Peninsula census-designated place, Galveston County, Texas, United States. The community is located in the extreme eastern part of the county on Bolivar Peninsula, less than one mile from Chambers County and less than two miles from Jefferson County. As of 2000[update], 500 people resided in High Island. The 2010 census did not record a population for High Island.
The Houston Audubon Society operates four bird sanctuaries in the area, and the community is a nationally famous destination for birdwatchers particularly from April 1 to May 15. Sea Rim State Park is in nearby Jefferson County, but it is inaccessible by State Highway 87, which has been closed since 1990.