Jefferson County, Missouri

Jefferson County: County in Missouri, United States

About

Jefferson County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 218,733 and a population density of 127 people per km². After 10 years in 2020 county had an estimated population of 226,543 inhabitants. Its county seat is Hillsboro. The county was created 206 years ago in 1817.

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

Quick Facts about Jefferson County

Population : 226,543 (2020)
Country : United States of America
State : Missouri (United States)
Different from : Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson Parish, Jefferson County, Jefferson County, Jefferson County, Jefferson County, Jefferson County
Area : 1720 km2
Water as percent of area : 1.2%
Land as percent of area : 98.8%
Named for : Thomas Jefferson
Capital : Hillsboro
Establishment : January 01, 1818
Time Zone : America/Chicago
Local time : 07:00:06 (22nd December 2024)
Density : 132 Pop. per km² as of 2020
Population growth : 3.45% (2010-2020)
Map of Missouri highlighting Jefferson County locator map image
Map of Missouri highlighting Jefferson County
Map of Missouri highlighting Jefferson County locator map image
Map of Missouri highlighting Jefferson County locator map image

Geography

Jefferson County is located at 38°15'40"N 90°32'16"W (38.2610700, -90.5376900). It has 5 neighbors: Monroe County, Franklin County, Saint Francois County, Sainte Genevieve County and Washington County.

Jefferson County map

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The largest city of Jefferson County is Arnold with a population of 21,145. Other cities include, Festus population 12,114, De Soto population 6,340, Pevely population 6,001 and Crystal City population 4,700. See all Jefferson County cities & populated places.

Jefferson County Populated Places (more)

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

City Name Population Title
Arnold 21,145 City in Missouri
Festus 12,114 City in Missouri
De Soto 6,340 City in Jefferson County, Missouri
Pevely 6,001 City in Jefferson County, Missouri, United States
Barnhart 5,682 Census designated place
Crystal City 4,700 City in Jefferson County, Missouri, United States
High Ridge 4,305 Census designated place
Herculaneum 4,261 Roman town
Riverside 3,528 City in Platte County, Missouri, United States
Hillsboro 3,355 City in Missouri, United States
Byrnes Mill 3,015 City in Jefferson County, Missouri, United States
Olympian Village 752 City in Jefferson County, Missouri, United States
Cedar Hill Lakes 227 Village in Jefferson County, Missouri, United States
Scotsdale 216 Human settlement in Jefferson County, Missouri, United States of America
Parkdale 162 Human settlement in Jefferson County, Missouri, United States of America
Kimmswick 140 City in Jefferson County, Missouri, United States

Jefferson County has 5 neighbours.

Demographics

The population of Jefferson County increased by 3.45% in 10 years.

Year Population % Change Method
2010 218,733 - census
2011 219,594 0.39% estimation process
2012 219,853 0.12% estimation process
2013 220,870 0.46% estimation process
2014 222,006 0.51% estimation process
2015 223,116 0.5% estimation process
2016 223,377 0.12% estimation process
2017 223,769 0.18% estimation process
2018 224,410 0.29% estimation process
2019 225,081 0.3% estimation process
2020 226,543 0.65% estimation process

Comitatul Jefferson, Comte de Jefferson, Comté de Jefferson, Condado de Jefferson, Condado han Jefferson, Contea di Jefferson, Dzhefersun, Dzhefferson, Hrabstwo Jefferson, Jeferson srjan, Jefferson, Jefferson Kun, Jefferson Kūn, Jefferson konderria, Jefferson megye, Jeffersoni maakond, Okrug DZeferson, Quan Jefferson, Quận Jefferson, jefason jun, jepharasana ka'unti, jie fu xun xian, mqatʿt jyfyrswn, shhrstan jfrswn myzwry, Джеферсън, Джефферсон, Округ Џеферсон, Ջեֆերսոն շրջան, جیفرسن کاؤنٹی، مسوری, جیفرسن کاؤنٹی،مسوری, شهرستان جفرسون، میزوری, مقاطعة جيفيرسون, জেফারশন কাউন্টি, ジェファーソン郡, 傑佛遜縣

People born in Jefferson County (2)

People born in Jefferson County, including politician Samuel Byrns, politician Paul Wieland, .

List

Other places with the same name (25)

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
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
Lee's Summit 101,467 The most populous city in Jackson County, Missouri.