20684 -- U.S. ZIP code Municipality (1990): SAINT INIGOES, Maryland All ZIPs for this municipality (1990): 20684 Population (2000): 1128 Housing Units (2000): 517 Land area (2000): 9.080006 sq. miles (23.517106 sq. km) Water area (2000): 0.037682 sq. miles (0.097597 sq. km) Total area (2000): 9.117688 sq. miles (23.614703 sq. km) Located within: Maryland (MD) Location: 38.151666 N, 76.405126 W