question: In what year did Pratt County, Kansas and Pratt, Kansas have the largest population?
answer: 2010
context: Title: Pratt, Kansas
  Passage: Pratt is a city in and the county seat of Pratt County, Kansas, United States.  As of the 2010 census, the city population was 6,835.  Pratt is home to Pratt Community College.
  Title: Pratt Regional Airport
  Passage: Pratt Regional Airport (IATA: PTT, ICAO: KPTT, FAA LID: PTT) is a public use airport located four nautical miles (7 km) north of the central business district of Pratt, a city in Pratt County, Kansas, United States.  Previously known as Pratt Industrial Airport, it is located on the site of the former Pratt Army Airfield.
  Title: Sawyer, Kansas
  Passage: Sawyer is a city in Pratt County, Kansas, United States.  As of the 2010 census, the city population was 124.
  Title: Cullison, Kansas
  Passage: Cullison is a city in Pratt County, Kansas, United States.  As of the 2010 census, the city population was 101.
  Title: Iuka, Kansas
  Passage: Iuka is a city in Pratt County, Kansas, United States.  As of the 2010 census, the city population was 163.
  Title: Coats, Kansas
  Passage: Coats is a city in Pratt County, Kansas, United States.  As of the 2010 census, the city population was 83.
  Title: K-64 (Kansas highway)
  Passage: K-64 was a 3.574 mi state highway in Pratt County, Kansas.  The highway was a partial bypass of Pratt that ran from U.S. Route 281 (US-281) just south of the city limits to US-54/US-400 east of them.  The route was maintained by the Kansas Department of Transportation until July 2016 when the road was turned over to Pratt County.  K-64 was not part of the National Highway System.  K-64 was designated at around 1932 and paved in 1937.
  Title: Pratt County, Kansas
  Passage: Pratt County (standard abbreviation: PR) is a county located in the U.S. state of Kansas.  As of the 2010 census, the county population was 9,656.  The largest city and county seat is Pratt.
citations: Pratt County, Kansas Pratt, Kansas