Located in Harris County, Bellaire is in the heart of the Houston, Texas metropolitan area, where Bellaire Avenue crosses the Beltway of US 610.
William Wright Baldwin, president of the South End Land Company, founded Bellaire and Westmoreland Farms after purchasing the 9,449-acre Rice Ranch in 1908. Baldwin was nationally known as vice president of the Burlington Railroad. Promotional advertising in 1909 explained that Bellaire was named for the area's Gulf breezes, but Baldwin may have named it for Bellaire, Ohio, a town served by his railroad.