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 2010 census, the city population was 33,800. 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. Fifteen years later, the Port of Houston's newest addition, Bayport Terminal, was established just south of La Porte. The area around La Porte has served an increasingly important role in international trade since the 1970s.The area around modern La Porte gained fame early in Texas history as the location of the Battle of San Jacinto on April 21, 1836, which ended the Texas Revolution, establishing the independence of the Republic of Texas from Mexico. The San Jacinto Monument, in the unincorporated area of La Porte, commemorates the battle.