Lyon County, Iowa

Lyon County
Lyon County
County
	Lyon County Courthouse
	Location within the U.S. state of Iowa
	Iowa's location within the U.S.
	Coordinates: 43°23′00″N 96°13′00″W / 43.383333333333°N 96.216666666667°W
Country	United States
State	Iowa
Founded	January 15, 1851
Named for	Nathaniel Lyon
Seat	Rock Rapids
Largest city	Rock Rapids
Area
• Total	588 sq mi (1,520 km2)
• Land	588 sq mi (1,520 km2)
• Water	0.1 sq mi (0.3 km2) 0.02%
Population (2020)
• Total	11,934
• Density	20/sq mi (7.8/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	4th
Website	lyoncounty.iowa.gov

Lyon County is the most northwesterly county of the U.S. state of Iowa. As of the 2020 census, the population was 11,934.^[1] The county seat is Rock Rapids.^[2]

Lyon County is named in honor of Brigadier General Nathaniel Lyon, who served in the Mexican–American War and the Civil War.^[3] He was killed at the Battle of Wilson's Creek, Missouri, on August 10, 1861, after which the county was named for him. The county's name was originally Buncombe County, but was changed by the state legislature on September 11, 1862.

^ "2020 Census State Redistricting Data". census.gov. United states Census Bureau. Retrieved August 12, 2021.
^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
^ Chicago and North Western Railway Company (1908). A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways. p. 162.

[cen2020-1] "2020 Census State Redistricting Data". census.gov. United states Census Bureau. Retrieved August 12, 2021.

[2] "Find a County". National Association of Counties. Retrieved June 7, 2011.

[3] Chicago and North Western Railway Company (1908). A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways. p. 162.

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