Eaton Rapids, Michigan, United States [City]; population was 4,695 in 1990; housing units was 1,872 in 1990; location is 42°31'N 84°39'W; land area is 3.04 square miles (1,944 acres); water area is 0.11 square miles (71 acres); FIPS code is 24540 [SourceCBP]