Marshall County, Kansas

Marshall County
Former Marshall County Courthouse (left), current one-story courthouse (right) in Marysville (2010)
Location within the U.S. state of Kansas
Kansas's location within the U.S.
Coordinates: 39°48′N 96°33′W / 39.800°N 96.550°W / 39.800; -96.550
Country United States
State Kansas
FoundedAugust 25, 1855
Named afterFrank J. Marshall
SeatMarysville
Largest cityMarysville
Area
  Total
905 sq mi (2,340 km2)
  Land900 sq mi (2,000 km2)
  Water4.9 sq mi (13 km2)  0.20%
Population
 (2020)
  Total
10,038
  Estimate 
(2023)
9,933
  Density11.1/sq mi (4.3/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Area code785
Congressional district1st
Websiteks-marshall.manatron.com

Marshall County is a county located in the U.S. state of Kansas. Its county seat and largest city is Marysville. As of the 2020 census, the county population was 10,038. The county was named after Frank J. Marshall, a state representative who operated the first ferry over the Big Blue River.