Joplin is a city in southern Jasper County and northern Newton County in the southwestern corner of the US 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. The population at the 2011 estimates places the city at 50,559, but with the recent annexation of Silver Creek, the population is now estimated at 51,186. In 2011, the surrounding Metropolitan Statistical Area had an estimated population of 176,849.