Simla, CO -- U.S. town in Colorado Population (2000): 663 Housing Units (2000): 261 Land area (2000): 0.542407 sq. miles (1.404828 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.542407 sq. miles (1.404828 sq. km) FIPS code: 70635 Located within: Colorado (CO), FIPS 08 Location: 39.140746 N, 104.082836 W ZIP Codes (1990): 80835 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Simla, CO Simla