Tonkawa, Oklahoma, United States [City]; population was 3,127 in 1990; housing units was 1,492 in 1990; location is 36°41'N 97°18'W; land area is 2.18 square miles (1,398 acres); water area is 0.02 square miles (14 acres); FIPS code is 74150 [SourceCBP]