Phelps County Courthouse is a historic courthouse located in Rolla, Phelps County, Missouri. The original section was built between 1860 and 1868 and is a two-story, Greek Revival style brick building. The original building measures approximately 45 feet by 65 feet. It sits on a stone foundation and has a low-pitched gable roof. A series of additions were made in 1881, 1912, c. 1950, and 1979.
It was listed on the National Register of Historic Places in 1993.