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Calamus

1. Calamus, Iowa, United States [City]; population was 379 in 1990; housing units was 170 in 1990; location is 41°50'N 90°46'W; land area is 0.49 square miles (312 acres); FIPS code is 9820 [SourceCBP]
2. Calamus, Iowa, United States [Populated Place] is in Clinton County; location is 41°49'33"N 90°45'29"W [SourceGSP]
3. Calamus, Iowa, United States Postal Service Zip Code is 52729 [SourcePSZ]