25187 -- U.S. ZIP code Municipality (1990): SOUTHSIDE, West Virginia All ZIPs for this municipality (1990): 25187 Population (2000): 669 Housing Units (2000): 372 Land area (2000): 40.095314 sq. miles (103.846381 sq. km) Water area (2000): 0.036066 sq. miles (0.093411 sq. km) Total area (2000): 40.131380 sq. miles (103.939792 sq. km) Located within: West Virginia (WV) Location: 38.722180 N, 82.027599 W