Longrun is an unincorporated community in western Ozark County, Missouri. It is located on Route 95 about 5.7 miles (9.2 km) northwest of Theodosia and 5.4 miles (8.7 km) southwest of Thornfield. Its post office closed and mail is now served by Theodosia.
Longrun was established in 1898 with a post office and school in Longrun Township near Longrun Creek.
- ^ a b Thornfield, Missouri, 7.5 Minute Topographic Quadrangle, USGS, 2004
- ^ Ava, Missouri, 30x60 Minute Topographic Quadrangle, USGS, 1985
- ^ Ozark County Place Names, 1928-1945, State Historical Society of Missouri