La Porte (lə pôrt) [key], city (1990 pop. 21,507), seat of La Porte co., NW Ind.; inc. 1835. It is a manufacturing center in fertile farmland on the edge of the Calumet industrial region. The city's products include machinery; plastic, paper, wood, rubber, and metal products; furniture; and chemicals. Seven lakes adjoin the city, which also has summer resort activities and tourism.