Mt. Olive Baptist Church is a historic Baptist church located at 301 Church Street in Mullins, Marion County, South Carolina. It was built between 1922 and 1926, and is a one-story, Late Gothic Revival style brick cruciform building. It has a complex hip and gable roof and features twin corner towers of unequal height, a stained glass oculus above each entrance at the second level, a belfry containing four large pointed arch openings, and a large tripartite Gothic-arched leaded stained glass window flanked by stained glass lancet windows. The church played a major role in the African-American community in Mullins. It was added to the National Register of Historic Places in 2000.