La Porte is a city in Harris County, Texas, United States, within the Bay Area of the Houston–Sugar Land–Baytown metropolitan area. As of the 2020 census, the city population was 35,124. La Porte is the fourth-largest incorporated city in Harris County. When La Porte celebrated its centennial in 1992, it was the home of Barbours Cut Terminal, operated by the Port of Houston Authority since 1977.