It borders (counter-clockwise from north) the municipalities of Naucalpan, Lerma, Ocoyoacac, and the boroughs of Cuajimalpa and Miguel Hidalgo of the Distrito Federal (Mexico City).
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These people were conquered a number of times, including by the Olmecs, the Nahuatlacs and by the region of Tlacopan before being conquered by the Aztec Triple Alliance and then, of course, the Spaniards.