Cidra, Puerto Rico, United States [ZonaUrbana]; population was 5,580 in 1990; housing units was 1,745 in 1990; location is 18°11'N 66°10'W; land area is 0.87 square miles (555 acres); water area is 0.00 square miles (1 acres); FIPS code is 18074 [SourceCBP]