Loiza, Puerto Rico, United States [ZonaUrbana]; population was 4,300 in 1990; housing units was 1,144 in 1990; location is 18°26'N 65°53'W; land area is 0.52 square miles (334 acres); water area is 0.04 square miles (23 acres); FIPS code is 46368 [SourceCBP]