Sullivan County, Missouri

Sullivan County: County in Missouri, United States


Sullivan County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 6,714 and a population density of 4 people per km². After 10 years in 2020 county had an estimated population of 6,033 inhabitants. Its county seat is Milan. The county was created 178 years ago in 1844.

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

Quick Facts about Sullivan County

Population : 6,033 (2020)
Country : United States of America
State : Missouri (United States)
Different from : Sullivan County, Sullivan County, Sullivan County, Sullivan County, Sullivan County
Area : 1687 km2
Water as percent of area : 0.5%
Land as percent of area : 99.5%
Named for : John Sullivan
Capital : Milan
Establishment : January 01, 1845
Time Zone : America/Chicago
Local time : 05:02:55 (21st September 2023)
Density : 4 Pop. per km² as of 2020
Population growth : -11.29% (2010-2020)
Weather : 76℉ Chance Rain Showers 7-days weather
Sullivan County Missouri courthouse image
Sullivan County Missouri courthouse
Sullivan County Missouri courthouse image


Sullivan County is located at 40°12'38"N 93°6'41"W (40.2106400, -93.1115200). It has 4 neighbors: Linn County, Grundy County, Mercer County and Putnam County.

Sullivan County map

The largest city of Sullivan County is Milan with a population of 1,764. Other cities include, Green City population 589, Newtown population 163, Humphreys population 107 and Pollock population 79. See all Sullivan County cities & populated places.

Sullivan County Populated Places

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

City Name Population Title
Milan 1,764 City in Missouri, USA
Green City 589 City in Sullivan County, Missouri, United States
Newtown 163 City in Missouri, United States
Humphreys 107 Human settlement in Sullivan County, Missouri, United States of America
Pollock 79 Settlement in Missouri, USA
Harris 55 City in Sullivan County, Missouri, United States
Osgood 42 Human settlement in Sullivan County, Missouri, United States of America


Sullivan County forecast: A chance of rain showers. Mostly sunny, with a high near 76. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible. more

Sullivan County has 4 neighbours.

  • Milan


According to census records, the population of Sullivan County decreased by 11.29% in 10 years.

Year Population % Change Method
2010 6,714 - census
2011 6,663 -0.77% estimation process
2012 6,556 -1.63% estimation process
2013 6,497 -0.91% estimation process
2014 6,472 -0.39% estimation process
2015 6,366 -1.67% estimation process
2016 6,333 -0.52% estimation process
2017 6,212 -1.95% estimation process
2018 6,233 0.34% estimation process
2019 6,089 -2.36% estimation process
2020 6,033 -0.93% estimation process

Comitatul Sullivan, Comte de Sullivan, Comté de Sullivan, Condado de Sullivan, Condado han Sullivan, Contea di Sullivan, Hrabstwo Sullivan, Okrug Salivan, Quan Sullivan, Quận Sullivan, Salivan srjan, Sallivan, Sulivan, Sullivan, Sullivan Kun, Sullivan Kūn, Sullivan konderria, Sullivan megye, sariban jun, sha li wen xian, shhrstan salywan myzwry, sullibhana ka'unti, Округ Саливан, Салливан, Салліван, Съливан, Սալիվան շրջան, سولیوان کاؤنٹی، مسوری, سولیوان کاؤنٹی،مسوری, شهرستان سالیوان، میزوری, مقاطعة سوليفان, সুল্লিভান কাউন্টি, サリバン郡, 沙利文縣

People born in Sullivan County (1)

American football and baseball player and coach, basketball coach (1899-1967) Toby Greene was born in Sullivan County

Other places with the same name (6)

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