Question: The County seat of Grant County, Kansas has a population of what?

Context paragraphs:
Grant County, Indiana: Grant County is a county located in the U.S. state of Indiana.  At the time of the 2010 census, the population was 70,061.  The county seat is Marion.  Important paleontological discoveries, dating from the Pliocene epoch, have been made at the Pipe Creek Sinkhole in Grant County.

Canyon City, Oregon: Canyon City is a city in Grant County, Oregon, United States.  It is the county seat of Grant County, and is about 2 mi south of John Day on U.S. Highway 395.  As of the 2010 census, the city had a total population of 703.

Grant County, North Dakota: Grant County is a county located in the U.S. state of North Dakota.  As of the 2010 census, the population was 2,394.  Its county seat is Carson.  Until November 28, 1916, Grant County was a part of Morton County.  The county was named in honor of General Ulysses S. Grant.

Ulysses, Kansas: Ulysses (pronounced ) is a city in and the county seat of Grant County, Kansas, United States.  It is named after Ulysses S Grant, the 18th President of the United States.  As of the 2010 census, the city population was 6,161.

Grant County, Kansas: Grant County (county code GT) is a county located in the U.S. state of Kansas.  As of the 2010 census, the county population was 7,829.  Its county seat and only city is Ulysses.

Ephrata, Washington: Ephrata ( ) is a city in Grant County, Washington, United States.  The population was 7,664 at the 2010 census.  It is the county seat of Grant County.

Carson, North Dakota: Carson is a city in Grant County, North Dakota, United States.  It is the county seat of Grant County, North Dakota.  The population was 293 at the 2010 census.

Hyannis, Nebraska: Hyannis is a village in Grant County, Nebraska, United States.  The population was 182 at the 2010 census.  It is the county seat of Grant County.

Petersburg, West Virginia: Petersburg is a city in Grant County, West Virginia, USA.  The population was 2,467 at the 2010 census.  It is the county seat of Grant County.

Milbank, South Dakota: Milbank is a city in Grant County, South Dakota, along the South Fork of the Whetstone River.  The population was 3,353 at the 2010 census.  It is the county seat of Grant County.  In 1925 The American Legion Department of South Dakota established a new program for high school aged youth that grew into a national program.  Milbank is the birthplace of American Legion Baseball played in all fifty states by more than five thousand teams.

Supporting paragraphs: Grant County, Kansas Ulysses, Kansas
Answer: 6,161