Rittman, Ohio, United States [City]; population was 6,147 in 1990; housing units was 2,329 in 1990; location is 40°58'N 81°47'W; land area is 5.59 square miles (3,580 acres); water area is 0.21 square miles (133 acres); FIPS code is 67356 [SourceCBP]