Ciales, Puerto Rico, United States [ZonaUrbana]; population was 3,370 in 1990; housing units was 1,149 in 1990; location is 18°20'N 66°28'W; land area is 0.77 square miles (494 acres); water area is 0.01 square miles (9 acres); FIPS code is 17773 [SourceCBP]