Lake Elsinore, California, United States [City]; population was 18,285 in 1990; housing units was 6,981 in 1990; location is 33°40'N 117°19'W; land area is 23.45 square miles (15,008 acres); water area is 6.56 square miles (4,198 acres); FIPS code is 39486 [SourceCBP]