Matlock is an unincorporated community in Mason County, Washington, United States. Matlock is the primary population center for the western part of Mason County, a sporadically populated logging area. The most notable sites are the church, food bank, general store, post office, local grange hall, and the Mary M. Knight school, grades kindergarten through senior high school; the school mascot is the Knight Owl.
Matlock features nearby lakes and recreational opportunities, including fishing, hiking, hunting, and horseback riding. The nearest lake to Matlock is Lake Nahwatzel. Every year during the first full weekend in May, Matlock hosts the Old Timers' Fair at Mary M. Knight School campus. The fair features food, crafts, tractors, and fun for the whole family. Matlock is located northwest of Olympia, Washington, about a 20-minute drive from the county seat, Shelton. Matlock is a secluded little town just outside of Shelton and Elma. Matlock is also home to Mason County Fire District 12.