Alanthus Grove is an unincorporated community in Gentry County, in the U.S. state of Missouri.
A post office called Alanthus Grove was established in 1855, and remained in operation until 1906. The community most likely was named for a grove of ailanthus trees near the original town site.
Coordinates: 40°18′25″N 94°32′39″W / 40.30694°N 94.54417°W