Lake Managua (also known as Lake Xolotlán) (located at ) is a lake in Nicaragua. The Spanish name is Lago de Managua or Lago Xolotlán. At 1,042 km², it is approximately long and wide. Similarly to the name of Lake Nicaragua, its name was coined by the Spanish conquerors from "Mangue" (their name for the Mánkeme tribes) and agua ("water"). The city of Managua, the capital of Nicaragua, lies on its southwestern shore.