Buchanan County, Missouri

Buchanan County: County in Virginia, United States


Buchanan County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 89,201 and a population density of 68 people per km². After 10 years in 2020 county had an estimated population of 86,530 inhabitants. Its county seat is Grundy. The county was created 165 years ago in 1857.

Quick Facts about Buchanan County

Population : 86,530 (2020)
Country : United States of America
State : Missouri (United States)
Different from : Buchanan County, Buchanan County
Area : 1305 km2
Water as percent of area : 0.2%
Land as percent of area : 99.8%
Named for : James Buchanan
Altitude : 919 feet / 280 meters
Capital : Grundy
Establishment : January 01, 1858
Time Zone : America/Chicago
Local time : 05:10:28 (6th June 2023)
Density : 66 Pop. per km² as of 2020
Population growth : -3.09% (2010-2020)
Buchanan County locator map
Location of Buchanan County on Missouri map.
BuchananCoCourthouse image
BuchananCoCourthouse image


Buchanan County is located at 39°39'35"N 94°48'22"W (39.6598600, -94.8061600). It has 6 neighbors: Russell County, Pike County, McDowell County, Dickenson County, Tazewell County and Mingo County.

Buchanan County map

The largest city of Buchanan County is Saint Joseph with a population of 74,074. Other cities include, Sparta population 2,076, Taos population 1,157, Agency population 651 and Easton population 233. See all Buchanan County cities & populated places.

Buchanan County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Buchanan County.

City Name Population Title
Saint Joseph 74,074 County seat of Buchanan County, Missouri, United States
Sparta 2,076 City in Christian County, Missouri
Taos 1,157 City in Buchanan County, Missouri, United States
Agency 651 Human settlement in Buchanan County, Missouri, United States of America
Rushville 275 Village in the United States
Easton 233 City in Buchanan County, Missouri, United States
De Kalb 222 City in Missouri, United States
Lewis and Clark Village 127 Village in the United States

Buchanan County has 6 neighbours.

  • Grundy


According to census records, the population of Buchanan County decreased by 3.09% in 10 years.

Year Population % Change Method
2010 89,201 - census
2011 89,728 0.59% estimation process
2012 89,930 0.22% estimation process
2013 89,826 -0.12% estimation process
2014 89,600 -0.25% estimation process
2015 89,082 -0.58% estimation process
2016 89,032 -0.06% estimation process
2017 88,660 -0.42% estimation process
2018 88,163 -0.56% estimation process
2019 87,364 -0.91% estimation process
2020 86,530 -0.96% estimation process

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People born in Buchanan County (1)

American judge Elizabeth A. McClanahan was born in Buchanan County

Other places with the same name (3)

Missouri Other Counties (more counties)

County Name Population Title
Saint Louis County 994,020 County in Minnesota, United States
Jackson County 705,925 County in Oregon, United States
Kansas City 495,327 Largest municipality in the U.
Saint Charles County 406,204 County in Missouri, United States
St. Louis 315,685 City in Missouri, United States
Greene County 294,997 County in Tennessee, United States
Clay County 253,463 County in North Carolina, United States
Jefferson County 226,543 County in Missouri, United States
Boone County 182,991 County in West Virginia, United States
Columbia 124,769 City in Missouri, United States
Jasper County 121,648 County in South Carolina, United States
Independence 116,774 County seat of Jackson County, Missouri, United States
East Independence 110,675 City in Jackson County, Missouri, United States of America
Cass County 106,806 County in Missouri, United States
Platte County 106,532 County in Wyoming, United States
Franklin County 104,469 County in Missouri, United States