35243 -- U.S. ZIP code Municipality (1990): CAHABA HEIGHTS, Alabama All ZIPs for this municipality (1990): 35243 Population (2000): 16535 Housing Units (2000): 7444 Land area (2000): 11.812758 sq. miles (30.594901 sq. km) Water area (2000): 0.019067 sq. miles (0.049384 sq. km) Total area (2000): 11.831825 sq. miles (30.644285 sq. km) Located within: Alabama (AL) Location: 33.437667 N, 86.745862 W