35673 -- U.S. ZIP code Municipality (1990): TRINITY, Alabama All ZIPs for this municipality (1990): 35673 Population (2000): 7523 Housing Units (2000): 3063 Land area (2000): 45.120621 sq. miles (116.861868 sq. km) Water area (2000): 0.332200 sq. miles (0.860395 sq. km) Total area (2000): 45.452821 sq. miles (117.722263 sq. km) Located within: Alabama (AL) Location: 34.581591 N, 87.118843 W