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Unincorporated Community in Los Angeles County
Population (2020 Census): 18,937 (Also see Earlier decennial Census Counts).
Population Under Age 18 (2020 Census): 23.5%
Population Density (2020 Census): 2,607.7 persons per square mile
Housing Units: 6,130
Persons Per Housing Unit: 3.1
Land Area: 7.26 square miles (18.81 square kilometers)
Water Area: 0.02 square miles (0.04 square kilometers)
Total Area: 7.28 square miles (18.86 square kilometers)
Geographic Coordinates (Latitude/Longitude): 34.477544 -118.6264

Name originally derived from Chumash Indian word Kaštiq, meaning "the eye." The Spanish later spelled the name Castéc. In English, the name was spelled a number of different ways (such as Casteque, Chastequike, Kastak, Cas Tec, Chastec, Kash Tuk, Castaice, Chasitec and Kastake), but, by 1889, it routinely came to be spelled as it is today.

Community pinpointed in red below. Click on map for larger map of unincorporated communities in Los Angeles County.

Map showing location of the community of Castaic