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.
Santa Barbara County, California Santa Barbara County, California, officially the County of Santa Barbara, is a county located in the southern portion of the state of California, in the United States. As of the 2010 census, the population was 423,895. The county seat is Santa Barbara, and the largest city is Santa Maria.