Jim Muir (1958 in Venice, California) is a professional skateboarder and skateboarding entrepreneur. He began skateboarding in 1963. He was a member of the Z-Boys skate team based in Santa Monica, California. Muir was the first member of the Z-Boys to use urethane wheels, and convinced Zephyr Surf Shop owner Jeff Ho to order them for the team. After the Z-Boys team collapsed, he skated for Sims Skateboards and, with Bob Biniak, helped to invent the first laminated skateboards. He founded Dogtown Skates in 1976, at the age of 18. The first skateboards were hand made, and at one point had skate figure Tony Hawk riding as an amateur.

His younger brother, Mike Muir, is the singer for Suicidal Tendencies.