Smith River National Recreation Area is a protected area located in northwestern California, United States. The national recreation area is in Six Rivers National Forest and is managed by the U.S. Forest Service, an agency of the U.S. Department of Agriculture. Created by Congress in 1990, Smith River National Recreation Area meets the northern border of Redwood National and State Parks.

The Smith River flows from the Klamath Mountains to the Pacific Ocean in Del Norte County in extreme northwestern California, on the West Coast of the United States. The river, about 25.1 miles (40.4 km) long, all within Del Norte County, flows through the Rogue River – Siskiyou National Forest, Six Rivers National Forest, and Jedediah Smith Redwoods State Park.