Rock Valley, IA -- U.S. city in Iowa Population (2000): 2702 Housing Units (2000): 1202 Land area (2000): 1.688887 sq. miles (4.374196 sq. km) Water area (2000): 0.052307 sq. miles (0.135474 sq. km) Total area (2000): 1.741194 sq. miles (4.509670 sq. km) FIPS code: 68205 Located within: Iowa (IA), FIPS 19 Location: 43.201624 N, 96.296379 W ZIP Codes (1990): 51247 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Rock Valley, IA Rock Valley