Justice Addition is an unincorporated community and census-designated place (CDP) in Logan County, West Virginia, United States. The community was first listed as a CDP prior to the 2020 census. The population was 331 at the 2020 census.

Justice Addition is in north-central Logan County along West Virginia Route 10, 3 miles (5 km) north of Logan, the county seat, and 8 miles (13 km) south of Chapmanville. The CDP sits on the west bank of the Guyandotte River, a north-flowing tributary of the Ohio River. The community of Henlawson borders Justice Addition to the northeast, across the Guyandotte.

According to the U.S. Census Bureau, the Justice Addition CDP has a total area of 0.12 square miles (0.32 km), of which 0.01 square miles (0.02 km), or 6.43%, are water.