What is the population of Adair County?

The population of Adair County, MO is 25,399.

Where is Adair County located?

Adair County, MO is located at latitude 40.1905600 and longitude -92.6007200. It is in United States.

What is the area of Adair County?

The area of Adair County, MO is 1494 km².

What is the elevation of Adair County?

Adair County, MO has an elevation of 293 meters (961 feet) above sea level.

What time zone is Adair County in?

Adair County, MO is in the America/Chicago time zone.

How has the population of Adair County changed?

The population of Adair County, MO has decreased from 25,607 (2010) to 25,399 (2020), a change of -0.8%.

Adair County, Missouri

Adair County: county in Oklahoma, United States

About

Adair County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 25,607 and a population density of 17 people per km². After 10 years in 2020 county had an estimated population of 25,399 inhabitants. Its county seat is Stilwell. The county was created 118 years ago in 1907.

Adair County locator map — Location of Adair County on Missouri map.

County Snapshot

Adair County at a glance

Adair County currently has 7 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Missouri counties

115

Open related pages

Largest city

Kirksville

Population 17,653

Quick Facts about Adair County

Population	25,399 (2020)
Country	United States of America
State	Missouri (United States)
Different from	Adair County, Adair County, Adair County
Area	1494 km²
Water as percent of area	0.6%
Land as percent of area	99.4%
Latitude & Longitude	40.1906,-92.6007
Named for	William Penn Adair
Altitude	928 feet / 283 meters
Capital	Stilwell
Establishment	July 16, 1907
Time Zone	America/Chicago
Local time	17:13:01 (18th April 2026)
Density	17 Pop. per km² as of 2020
Population growth	-0.82% (2010-2020)

Adair County Oklahoma courthouse image

Geography

Adair County is located at 40°11'26"N 92°36'3"W (40.1905600, -92.6007200). It has 2 neighbors: Delaware County and Sequoyah County.

Adair County map

Click "full screen"

icon to open full mode. View satellite images

The largest city of Adair County is Kirksville with a population of 17,653. Other cities include, Novinger population 431, Brashear population 259, Clay population 232 and Gibbs population 102. See all Adair County cities & populated places.

Adair County Populated Places

Cities, towns, neighborhoods & other populated places in Adair County.

City Name	Population	Title
Kirksville	17,653	City in Adair County, Missouri, United States
Novinger	431	City in Adair County, Missouri, United States
Brashear	259	City in Missouri, United States
Clay	232	Unincorporated community in Missouri
Wilson	110	Township in Adair County, Missouri
Gibbs	102	Human settlement in Adair County, Missouri, United States of America
Millard	85	Village in Pettis Township, Adair County, Missouri, United States

Adair County has 2 neighbours.

Delaware County county in Oklahoma, United States
Sequoyah County county in Oklahoma, United States

Demographics

According to census records, the population of Adair County decreased by 0.82% in 10 years.

Year	Population	% Change	Method
2010	25,607	-	census
2011	25,657	0.19%	estimation process
2012	25,675	0.07%	estimation process
2013	25,703	0.11%	estimation process
2014	25,521	-0.71%	estimation process
2015	25,353	-0.66%	estimation process
2016	25,244	-0.43%	estimation process
2017	25,429	0.73%	estimation process
2018	25,476	0.18%	estimation process
2019	25,343	-0.52%	estimation process
2020	25,399	0.22%	estimation process

Adair, Adair Kun, Adair Kūn, Adair konderria, Adehr, Ader, Ader srjan, Adeur, Comitatul Adair, Comte d'Adair, Comté d'Adair, Condado de Adair, Condado han Adair, Contea di Adair, Hrabstwo Adair, Okrug Ader, Quan Adair, Quận Adair, aderu jun, mqatʿt adyr, shhrstan adyr myzwry, ya dai er xian, Адер, Адеър, Адэр, Округ Адер, Ադեր շրջան, ادیر کاؤنٹی, اڈئیر کاؤنٹی، مسوری, شهرستان ادیر، میزوری, مقاطعة أدير, অ্যডায়ার কাউন্টি, アデール郡, 亞代爾縣

Other places with the same name (3)

Adair County, Oklahoma county in Oklahoma, United States with a population of 21,955 people.
Adair County, Kentucky county in Kentucky, United States with a population of 19,555 people.
Adair County, Iowa county in Iowa, United States with a population of 7,059 people.

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	The third most populous city in Missouri and the center of the Kansas City metropolitan area.
Saint Charles County	406,204	County in Missouri, United States
St. Louis	315,685	The second most populous city in Missouri and the center of the St.
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	The most populous city in the state of Missouri.
Jasper County	121,648	County in South Carolina, United States
Independence	116,774	A city in Jackson County, Missouri.
East Independence	110,675	A census-designated place in Jackson County, Missouri.
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