Which is city is the county seat of a county with a standard abbreviation of SU?
Sumner County, Kansas Sumner County (standard abbreviation: SU) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 24,132. Its county seat is Wellington.
St. Joseph County, Indiana St. Joseph County, commonly called St. Joe County by locals, is a county located in the U.S. state of Indiana. As of Census 2010, the population was 266,931, making it the fifth-most populous county in Indiana. Formed in 1830, it was named for the St. Joseph River which flows through it toward Lake Michigan. The county seat is South Bend.