34677 -- U.S. ZIP code Municipality (1990): OLDSMAR, Florida All ZIPs for this municipality (1990): 34677 Population (2000): 19628 Housing Units (2000): 8883 Land area (2000): 12.629712 sq. miles (32.710802 sq. km) Water area (2000): 0.105161 sq. miles (0.272365 sq. km) Total area (2000): 12.734873 sq. miles (32.983167 sq. km) Located within: Florida (FL) Location: 28.042799 N, 82.677371 W