Question: What is the seat of the county that includes Belle Plaine, Kansas?

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Hooper-Bowler-Hillstrom House: The Hooper-Bowler-Hillstrom House was built in 1871 in Belle Plaine, Minnesota, United States, by Sandford A. Hooper, a local businessman and promoter of the town.  In 1886 it conveyed to Samuel Bowler, a founder of the State Bank of Belle Plaine and lumber-yard owner.  Bowler added a new kitchen, buttery, and a five-hole, two-story outhouse that is connected to the house via a skyway.  He also added a copper-lined bathtub.  When the Bowlers moved to Denver, Colorado in 1901, the clapboard frame house was sold to Alfred Hillstrom whose family lived in the house until it was purchased in 1975 by the town's Historical Society.  It is now owned by the city of Belle Plaine and is open to the public.  Current furnishings include three periods-1850s and 1860s, Victorian, and early 1900s.

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.

Frank E. and Katie (Cherveny) Zalesky House: The Frank E. and Katie (Cherveny) Zalesky House is a historic residence located in Belle Plaine, Iowa, United States.  Built around 1872, the 2½-story, brick house features a mansard roof with dormers, roof cresting, veranda-like porch, bracketed cornice, a two-story bay, and windows with heavy hoods.  The Zalesky family were part of Belle Plaine's Bohemian immigrant community.  That community included author, philosopher, teacher and journalist František Klácel who lived in this house at the end of his life under the Zalesky's care.  The house was listed on the National Register of Historic Places in 2012.

Belle Plaine, Saskatchewan: Belle Plaine is a village in the rural municipality of Pense No. 160, in the Canadian province of Saskatchewan.  Belle Plaine is located on Highway 1 or the Trans Canada Highway 21 kilometers east of Moose Jaw in south central Saskatchewan.  Buffalo Pound Provincial park and Regina Beach are located near Belle Plaine.  This village had a population of 64 according to the municipality.  The 2006 census enumerated this location with the R.M. of Pense No. 160.

Sankot Motor Company: The Sankot Motor Company, also known as the Sankot Garage, is a historic building located in Belle Plaine, Iowa, United States.  The historical significance of this building is its association with the increase in all-season travel and the development of businesses to serve them along the Lincoln Highway, the United States's first transcontinental route.  It is a brick front building with side walls of clay tile that was constructed on a concrete foundation.  The west half of the building was added in 1927.  It was operated by O.B. Charles and Sid Sankot until 1937.  They also sold Chryslers. Gasoline was sold from 1920 to 1944.  F.L. Sankot bought the business in 1937.  In addition to vehicle repair he sold Case and Oliver tractors and implements.  William and Jerry Sankot purchased the business in 1985, and limited it to passenger, commercial and agricultural vehicle repairs.  The building was listed on the National Register of Historic Places in 1995.  It was included as a contributing property in the Belle Plaine Main Street Historic District in 2013.

Belle Plaine (community), Wisconsin: Belle Plaine is an unincorporated community located in the town of Belle Plaine, Shawano County, Wisconsin, United States.  Belle Plaine is 5.5 mi south-southwest of Shawano.

Belle Plaine Main Street Historic District: The Belle Plaine Main Street Historic District is a nationally recognized historic district located in Belle Plaine, Iowa, United States.  It was listed on the National Register of Historic Places in 2013.  At the time of its nomination it contained 63 resources, which included 46 contributing buildings, one contributing structure, and 16 non-contributing buildings.  The historic district covers most of the city's central business district.  Belle Plaine was laid out in 1862 as a railroad town.  The Chicago & North Western Railroad was extended from Cedar Rapids the following year.  The commercial district is adjacent to the tracks.  A major fire destroyed much of the business district in 1894.  Thirty-five buildings in the district were built in the months after the fire.

Belle Plaine, Wisconsin: Belle Plaine is a town in Shawano County, Wisconsin, United States.  The population was 1,867 at the 2000 census.  The unincorporated communities of Adams Beach and Belle Plaine are located in the town.  The former unincorporated community of Hunting was located partially in the town.

Belle Plaine, Kansas: Belle Plaine is a city in Sumner County, Kansas, United States.  As of the 2010 census, the city population was 1,681.

KHLT-FM: KHLT-FM (99.7 FM) is an American radio station broadcasting a Regional Mexican format in Wichita, Kansas.  The station is licensed to Belle Plaine, Kansas.

Supporting paragraphs: Belle Plaine, Kansas Sumner County, Kansas
Answer: Wellington