what county is joplin, mo in?
Joplin or is a city in southern Jasper County and northern Newton County in the southwestern corner of the U.S. state of Missouri. Joplin is the largest city in Jasper County, though it is not the county seat. As of the 2010 census, the city population was 50,150. Joplin is the main hub of the three-county Joplin-Miami, Oklahoma metropolitan area.