Buchanan County , Missouri

Buchanan County: County in Virginia, United States

Buchanan County locator map
Location of Buchanan County on Missouri map.


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 9 years in 2019 county had an estimated population of 87,364 inhabitants. Its county seat is Grundy. The county was created 163 years ago in 1857.


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.

BuchananCoCourthouse image

The largest city of Buchanan County is Saint Joseph with a population of 74,875. Other cities include, Sparta population 1,946, Taos population 1,153, Agency population 660 and Easton population 233. See all Buchanan County cities & populated places.

BuchananCoCourthouse image

Buchanan County map

Buchanan County Quick Facts

Population : 87,364 (2019)
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 : 23:22:48 (24th June 2021)
Density : 67 Pop. per km² as of 2019
Population growth : -2.1% (2010-2019)

Buchanan County has 6 neighbours.

  • Grundy


According to census records, the population of Buchanan County decreased by 2.1% in 9 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

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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 (2)

Buchanan County Populated Places

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

City Name Population Title
Saint Joseph 74,875 County seat of Buchanan County, Missouri, United States
Sparta 1,946 City in Christian County, Missouri
Taos 1,153 City in Buchanan County, Missouri, United States
Agency 660 Human settlement in Buchanan County, Missouri, United States of America
Rushville 280 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 128 Village in the United States

Missouri Other Counties (more counties)

County Name Population Title
Missouri 6,137,428 State of the United States of America
Saint Louis County 994,205 County in Minnesota, United States
Jackson County 703,011 County in Oregon, United States
Kansas City 495,327 Largest municipality in the U.
Saint Charles County 402,022 County in Missouri, United States
St. Louis 315,685 City in Missouri, United States
Greene County 293,086 County in Tennessee, United States
Clay County 249,948 County in North Carolina, United States
Jefferson County 225,081 County in Missouri, United States
Boone County 180,463 County in West Virginia, United States
Columbia 123,195 City in Missouri, United States
Jasper County 121,328 County in South Carolina, United States
Cass County 105,780 County in Missouri, United States
Platte County 104,418 County in Wyoming, United States
Franklin County 103,967 County in Missouri, United States
Lee's Summit 99,357 City in Missouri, United States

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