The Old Forest Arboretum of Overton Park is a forest tract and natural arboretum located in Overton Park, Memphis, Tennessee. It is open to the public daily without charge. The forest was placed on the National Register of Historic Places in 1979 as part of the Overton Park Historic District. Tree identification began in 1997, with some 70 tree species identified by 2002 when it was certified as an arboretum.
Today the arboretum contains walking trails with 49 tree markers identifying 32 species. Approximately three-fourths of the Arboretum was designated as the Old Forest State Natural Area in 2011.