Three Forks is an unincorporated community in Pennington County, South Dakota, United States.

A small general store featuring fuel is open year-round; other businesses are open seasonally, including a campground, a motel, a miniature golf-course, and an ice-cream stand.

The campground is the site of an annual Octoberfest event, and the area is heavily patronized during the Sturgis Motorcycle Rally in August of each year.

In recent years, considerable residential development of the immediate area has swollen its population.

This South Dakota state location article is a stub.