Lafayette (formerly, La Fayette) is a city in Contra Costa County, California, United States. As of 2011, the city's population was estimated to be 24,285. Today Lafayette is known for its wealthy inhabitants and pastoral rolling hills. The town is also known for excellent schools within the highly ranked Acalanes School District. In 2012, estimated median household income in Lafayette was over 150,000 dollars, more than double the statewide average and nearly triple the national average. Before the colonization of the region by Spain, Lafayette and its vicinity were inhabited by the Saclan tribe of the indigenousBay Miwok. Ohlone also populated some of the areas along Lafayette Creek. The indigenous inhabitants' first contact with Europeans was in the late 18th century with the founding of Catholic missions in the region. These initial contacts developed into conflict, with years of armed struggle, including a battle on what is currently Lafayette soil in 1797 between the Saclan and the Spanish, and eventually resulting in the subjugation of the native population.