03278 -- U.S. ZIP code Municipality (1990): WARNER, New Hampshire All ZIPs for this municipality (1990): 03278 Population (2000): 3005 Housing Units (2000): 1350 Land area (2000): 67.247272 sq. miles (174.169628 sq. km) Water area (2000): 0.345261 sq. miles (0.894223 sq. km) Total area (2000): 67.592533 sq. miles (175.063851 sq. km) Located within: New Hampshire (NH) Location: 43.283838 N, 71.825373 W