Mercer County, Missouri

Mercer County: County in Missouri, United States


Mercer County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 3,785 and a population density of 3 people per km². After 10 years in 2020 county had an estimated population of 3,558 inhabitants. Its county seat is Princeton. The county was created 178 years ago in 1844.

Quick Facts about Mercer County

Population : 3,558 (2020)
Country : United States of America
State : Missouri (United States)
Different from : Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County, Mercer County
Area : 1179 km2
Water as percent of area : 0.3%
Land as percent of area : 99.7%
Named for : John Francis Mercer
Capital : Princeton
Establishment : January 01, 1845
Time Zone : America/Chicago
Local time : 00:24:46 (9th February 2023)
Density : 3 Pop. per km² as of 2020
Population growth : -6.38% (2010-2020)
Mercer County locator map
Location of Mercer County on Missouri map.
Mercer County Missouri Courthouse 20151003-051 image
Mercer County Missouri Courthouse 20151003-051
Mercer County Missouri Courthouse 20151003-051 image


Mercer County is located at 40°25'20"N 93°34'7"W (40.4223300, -93.5685600). It has 6 neighbors: Decatur County, Wayne County, Grundy County, Harrison County, Putnam County and Sullivan County.

Mercer County map

The largest city of Mercer County is Princeton with a population of 1,078. Other cities include and Mercer population 296. See all Mercer County cities & populated places.

Mercer County Populated Places

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

City Name Population Title
Princeton 1,078 City in Mercer County, Missouri
Mercer 296 City in Missouri, USA
Ravanna 205 Township in Mercer County, Missouri
South Lineville 27 Village in the United States

Mercer County has 6 neighbours.

  • Princeton


According to census records, the population of Mercer County decreased by 6.38% in 10 years.

Year Population % Change Method
2010 3,785 - census
2011 3,774 -0.29% estimation process
2012 3,708 -1.78% estimation process
2013 3,664 -1.2% estimation process
2014 3,683 0.52% estimation process
2015 3,660 -0.63% estimation process
2016 3,661 0.03% estimation process
2017 3,656 -0.14% estimation process
2018 3,626 -0.83% estimation process
2019 3,617 -0.25% estimation process
2020 3,558 -1.66% estimation process

Comitatul Mercer, Comte de Mercer, Comté de Mercer, Condado de Mercer, Condado han Mercer, Contea di Mercer, Hrabstwo Mercer, Mercer, Mercer Kun, Mercer Kūn, Mercer konderria, Mercer megye, Merser, Merser srjan, Mursur, Okrug Merser, Quan Mercer, Quận Mercer, mararsera ka'unti, masa jun, mo se xian, mqatʿt myrsyr, shhrstan mrsr myzwry, Мерсер, Мърсър, Округ Мерсер, Մերսեր շրջան, شهرستان مرسر، میزوری, مرسر کاؤنٹی، مسوری, مرسر کاؤنٹی،مسوری, مقاطعة ميرسير, মারর্সের কাউন্টি, マーサー郡, 默瑟縣

People born in Mercer County (1)

Texas politician Roy Alvin Baldwin was born in Mercer County

Other places with the same name (8)

Missouri Other Counties (more counties)

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Kansas City 495,327 Largest municipality in the U.
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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