The first burial ground for the citizens of Mason and Koocksville, this cemetery traces its history to the 1850s. The oldest documented burial is that of Kate Lemburg, who died in 1856. Also interred here is Mason County's first sheriff, Thomas Milligan (1810-1860). The Crosby family purchased the property surrounding the cemetery in 1866, and it has been known as Crosby cemetery since that time. Those buried in the cemetery include members of the Crosby and other pioneer families. It stands as a reflection of the area's heritage. (1988)