Salkum is a rural unincorporated community in Lewis County, Washington. The town is located on U.S. Route 12 and is 2.1 miles (3.4 km) west of Silver Creek.

Lewis County is a county in the U.S. state of Washington. As of the 2020 census, the county's population was 82,149. The county seat is Chehalis, and its largest city is Centralia. Lewis County comprises the Centralia, WA Micropolitan Statistical Area, which is also included in the Seattle-Tacoma, WA Combined Statistical Area.