Ritchey is a village in Newton County, Missouri, United States. The population was 82 at the 2010 census. It is part of the Joplin, Missouri Metropolitan Statistical Area. Ritchey was originally called Richville, and under the latter name was platted in 1870. The community was named for its founder, Matthew H. Ritchey, who had settled there in 1832. A pos…Ritchey is a village in Newton County, Missouri, United States. The population was 82 at the 2010 census. It is part of the Joplin, Missouri Metropolitan Statistical Area. Ritchey was originally called Richville, and under the latter name was platted in 1870. The community was named for its founder, Matthew H. Ritchey, who had settled there in 1832. A post office called Ritchey was established in 1871, and remained in operation until 1974.