What is the population of Sullivan County?

The population of Sullivan County, MO is 6,033.

Where is Sullivan County located?

Sullivan County, MO is located at latitude 40.2106400 and longitude -93.1115200. It is in United States.

What is the area of Sullivan County?

The area of Sullivan County, MO is 1687 km².

What is the elevation of Sullivan County?

Sullivan County, MO has an elevation of 253 meters (830 feet) above sea level.

What time zone is Sullivan County in?

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

How has the population of Sullivan County changed?

The population of Sullivan County, MO has decreased from 6,714 (2010) to 6,033 (2020), a change of -10.1%.

Sullivan County, Missouri

Sullivan County: county in Missouri, United States.

About

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 181 years ago in 1844.

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

County Snapshot

Sullivan County at a glance

Sullivan County currently has 1 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

Milan

Population 1,764

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%
Latitude & Longitude	40.2106,-93.1115
Named for	John Sullivan
Capital	Milan
Establishment	January 01, 1845
Time Zone	America/Chicago
Local time	06:16:51 (23rd September 2026)
Density	4 Pop. per km² as of 2020
Population growth	-10.14% (2010-2020)
Weather	70℉ Mostly Sunny 7-days weather

Sullivan County Missouri courthouse image

Geography

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

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The largest city of Sullivan County is Milan with a population of 1,764. . 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

Weather

70°F

Mostly Sunny

3 to 7 mph NE Wednesday

Mostly sunny, with a high near 70. Northeast wind 3 to 7 mph.

7-Day Forecast

Sullivan County has 4 neighbours.

Linn County county in Missouri, United States.
Grundy County county in Missouri, United States.
Mercer County county in Missouri, United States.
Putnam County county in Missouri, United States.

Milan

Demographics

According to census records, the population of Sullivan County decreased by 10.14% in 10 years.

Year	Population	% Change	Method
2010	6,714	-	census
2011	6,663	-0.76%	estimation process
2012	6,556	-1.61%	estimation process
2013	6,497	-0.9%	estimation process
2014	6,472	-0.38%	estimation process
2015	6,366	-1.64%	estimation process
2016	6,333	-0.52%	estimation process
2017	6,212	-1.91%	estimation process
2018	6,233	0.34%	estimation process
2019	6,089	-2.31%	estimation process
2020	6,033	-0.92%	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 (5)

Sullivan County, Tennessee county in New York, United States. with a population of 158,755 people.
Sullivan County, New York county in New York, United States. with a population of 75,802 people.
Sullivan County, New Hampshire county in New Hampshire, United States. with a population of 43,267 people.
Sullivan County, Indiana county in Indiana, United States. with a population of 20,578 people.
Sullivan County, Pennsylvania county in Pennsylvania, United States. with a population of 5,913 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