Jefferson County, Missouri facts for kids

Quick facts for kids Jefferson County
U.S. county
The Jefferson County Courthouse in Hillsboro
Seal
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Country	United States
State	Missouri
Founded	1818
Named for	Thomas Jefferson
Seat	Hillsboro
Largest city	Arnold
Area
• Total	664 sq mi (1,720 km2)
• Land	657 sq mi (1,700 km2)
• Water	7.7 sq mi (20 km2)  1.2%
Population  (2020)
• Total	226,739
• Density	341.47/sq mi (131.84/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional districts	2nd, 3rd, 8th

Jefferson County is located in the eastern portion of the U.S. state of Missouri. It is a part of the St. Louis Metropolitan Area. As of the 2020 census, the population was 226,739, making it the sixth-most populous county in Missouri. Its county seat is Hillsboro. The county was organized in 1818 and named in honor of former president Thomas Jefferson.

In 1980, according to the U.S. census held that year, the county contained the mean center of U.S. population. Notably, this was the first census in which the center of population was west of the Mississippi River.

Jefferson County is part of the St. Louis Metropolitan Statistical Area and encompasses many of the city's southern suburbs.

Geography

According to the U.S. Census Bureau, the county has a total area of 664 square miles (1,720 km²), of which 657 square miles (1,700 km²) is land and 7.7 square miles (20 km²) (1.2%) is water. The county's eastern border is the Mississippi River.

Adjacent counties

• St. Louis County (north)
• Monroe County, Illinois (east)
• Ste. Genevieve County (southeast)
• St. Francois County (south)
• Washington County (southwest)
• Franklin County (west)

Major highways

• Interstate 55
• U.S. Route 61
• U.S. Route 67
• Route 21
• Route 30
• Route 109
• Route 110
• Route 141
• Route 231

National protected area

• Middle Mississippi River National Wildlife Refuge (part)

Demographics

As of the 2020 Census Jefferson County had a population of 226,739. The ethnic and racial makeup of the county was 90.4% white (89.7% non-Hispanic white), 1.0% black or African American, 0.3% American Indian, 0.8% Asian, 0.8% some other race, and 6.6% two or more races. 2.4% of the population was of Hispanic or Latino origin.

As of the 2010 Census Jefferson County had a population of 218,733. The reported ethnic and racial make up of the population was 95.4% non-Hispanic white, 0.8% African-American, 0.3% Native American, 0.6% Asian, 0.4% reporting some other race, 1.3% reporting two or more races and 1.6% Hispanic or Latino of any race.

As of the census of 2000, there were 198,099 people, 71,499 households, and 54,553 families residing in the county. The population density was 302 inhabitants per square mile (117/km²). There were 75,586 housing units at an average density of 115 units per square mile (44/km²). The racial makeup of the county was 97.48% White, 0.68% Black or African American, 0.29% Native American, 0.36% Asian, 0.01% Pacific Islander, 0.24% from other races, and 0.93% from two or more races. Approximately 1.01% of the population were Hispanic or Latino of any race.

There were 71,499 households, out of which 38.90% had children under the age of 18 living with them, 61.00% were married couples living together, 10.40% had a female householder with no husband present, and 23.70% were non-families. 18.90% of all households were made up of individuals, and 6.10% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.12.

In the county, the population was spread out, with 27.90% under the age of 18, 8.50% from 18 to 24, 31.80% from 25 to 44, 22.50% from 45 to 64, and 9.20% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 98.90 males. For every 100 females age 18 and over, there were 95.90 males.

The median income for a household in the county was $60,636, and the median income for a family was $66,697. Males had a median income of $37,822 versus $25,440 for females. The per capita income for the county was $25,058. About 4.90% of families and 6.80% of the population were below the poverty line, including 8.10% of those under age 18 and 6.30% of those age 65 or over.

There were 146,316 registered voters in 2008. As of October 24, 2012, there were 148,011.

2020 Census

Education

Public schools

• School District 47 - Crystal City
  • Crystal City High School - Crystal City
• De Soto School District 73 - De Soto
  • Early Childhood Center (PK)
  • Athena Elementary School (K-06)
  • Vineland Elementary School (K-06)
  • De Soto Jr. High School (07-08)
  • De Soto High School (09-12)
• Dunklin R-V School District - Herculaneum
• Festus R-IV School District - Festus
  • Festus Elementary School (K-03)
  • Festus Intermediate School (04-06)
  • Festus Middle School (07-08)
  • Festus High School (09-12)
• Fox C-6 School District - Arnold
• Grandview R-II School District - Hillsboro
  • Grandview Elementary School (K-05) - Hillsboro
  • Grandview Middle School (06-08) - Hillsboro
  • Grandview High School (09-12) - Ware
• Hillsboro R-3 School District - Hillsboro
  • Hillsboro Primary School (K-02)
  • Hillsboro Elementary School (03-04)
  • Hillsboro Middle School (05-06)
  • Hillsboro Jr. High School (07-08)
  • Hillsboro High School (09-12)
• Jefferson County R-VII School District - Festus
  • Plattin Primary School (PK-02) - Plattin
  • Telegraph Intermediate School (03-05) - Festus
  • Danby-Rush Tower Middle School (06-08) - Festus
  • Jefferson High School- Festus
• Northwest R-I School District - High Ridge
  • Brennan Woods Elementary School (K-05) - High Ridge
  • Cedar Springs Elementary School (K-05) - House Springs
  • High Ridge Elementary School (K-05) - High Ridge
  • House Springs Elementary School (K-05) - House Springs
  • Maple Grove Elementary School (K-05) - Dittmer
  • Murphy Elementary School (K-05) - High Ridge
  • Woodridge Middle School (06-08) - High Ridge
  • Valley Middle School (06-08) - House Springs
  • Northwest High School (09-12) - Cedar Hill
• Sunrise R-IX School District - De Soto
  • Sunrise Elementary School (K-08) - De Soto
• Windsor C-1 School District - Imperial

Private schools

• Christian Outreach School (K-12) - Hillsboro - Nondenominational Christian
• People's Christian Academy (K-12) - Arnold - Assembly of God/Pentecostal
• St. Pius X High School (09-12) - Festus - Roman Catholic
• Twin City Christian Academy (PK-12) - Festus - Baptist
• Good Shepherd Catholic School - (K-08) - Hillsboro - Roman Catholic
• Holy Child Elementary & Middle School - Arnold - (K-08) - Roman Catholic
• Manna Christian Academy - De Soto - (K-12) - Southern Baptist
• Our Lady's Catholic School - Festus - (K-08) - Roman Catholic
• Sacred Heart Catholic School - Festus - (K-08) - Roman Catholic
• St. Anthony's Catholic School - High Ridge - (K-08) - Roman Catholic
• St. Joseph's Catholic School - Imperial - (K-08) - Roman Catholic
• St. Johns Lutheran School - Arnold - (PK-08) - Lutheran
• St. Johns School - Imperial - (K-08) - Nondenominational Christianity
• St. Rose of Lima Catholic School - De Soto - (K-08) - Roman Catholic

Post-secondary

Jefferson College - Hillsboro A public, two-year community college

Public libraries

• Crystal City Public Library
• De Soto Public Library
• Festus Public Library
• Herculaneum Public Library
• Jefferson County Public Library

Jefferson County Parks and Recreation

Communities

Cities

Villages

Townships

Census-designated places

Other unincorporated communities

See also

In Spanish: Condado de Jefferson (Misuri) para niños