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.
Susanville, California Susanville (formerly known as Rooptown) is the county seat of Lassen County, California, United States. Susanville is located on the Susan River in the southern part of the county, at an elevation of 4186 ft . The population was 17,974 in the 2010 census, up from 13,541 in the 2000 census. Much of the population increase is related to persons held at two state prisons in the city.