Nikiski, Alaska, United States [CDP]; population was 2,743 in 1990; housing units was 1,045 in 1990; location is 60°44'N 151°23'W; land area is 28.11 square miles (17,990 acres); water area is 90.05 square miles (57,634 acres); FIPS code is 54050 [SourceCBP]