Atlatlahucan is a city in the Mexican state of Morelos. The name means Place of red or brown water, and today the water is stored in a type of cistern called a jagüey. To the north is the State of Mexico, south is Cuautla, east is Yecapixtla, and west are Tlayacapan and Yautepec. It stands at 18°56′N 98°54′W,
at a mean height of 1,656 metres above sea level. The municipality covers 71 km².
The city serves as the municipal seat for the surrounding municipality of the same name. The municipality reported 22,079 inhabitants in the 2015 census. The population of the municipality of Atlatlahucan was 25,232 and the city of Atlatlahucan was 9,018 in 2020.