Jersey County, Illinois facts for kids

Quick facts for kids Jersey County
U.S. county
Jersey County Courthouse in Jerseyville
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Country	United States
State	Illinois
Founded	February 28, 1839
Named for	New Jersey
Seat	Jerseyville
Largest city	Jerseyville
Area
• Total	377 sq mi (980 km2)
• Land	369 sq mi (960 km2)
• Water	7.9 sq mi (20 km2)  2.1%
Population  (2020)
• Total	21,512
• Density	57.06/sq mi (22.031/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	13th

Jersey County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 21,512. The county seat and largest community is Jerseyville, with a population of 8,337. The county's smallest incorporated community is Otterville, with a population of 87.

Jersey County is included in the St. Louis, MO-IL Metropolitan Statistical Area.

History

Jersey County lies just northeast of where the great Mississippi and Illinois rivers meet. It is the former home of the Kickapoo, Menomini, Potawatomi, and Illiniwek Confederation American Indians. The first European explorers to visit the area, Father Marquette and Louis Jolliet, arrived in 1673, where they encountered the fearsome painting of the Piasa bird. The present day Pere Marquette State Park, located near Grafton, is named in Father Marquette's honor, and a monument to him is located at the park.

Jersey County was founded on February 28, 1839, and was formed out of Greene County. The county was named for the state of New Jersey, from which many of the early settlers emigrated - which was itself named for the Channel Island of Jersey in Great Britain. The area quickly evolved into several small agricultural communities. As the area soon began to flourish, a county government was established and a courthouse was built in Jerseyville, the county seat. The present courthouse is a magnificent architectural structure that was built in 1893.

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  Jersey County at the time of its creation in 1839

Recent history

Today, while the county maintains its agricultural base, it is also within commuting distance of jobs and industry in St. Louis, Missouri and the surrounding area. A large portion of the population works outside of Jersey County and benefits from being "Near the crowd, but not in it.", the official slogan of the Jersey County Business Association's advertising campaign. The bordering rivers play an important part in Jersey County's economy by supporting agricultural producers and agribusiness, and by creating a strong tourist market. Education, manufacturing, and retail are among the county's largest industries.

Geography

According to the U.S. Census Bureau, the county has a total area of 377 square miles (980 km²), of which 369 square miles (960 km²) is land and 7.9 square miles (20 km²) (2.1%) is water. Jersey County is bordered by three bodies of water: the Mississippi River to the south, the Illinois River to the west, and Macoupin Creek to the northwest.

Climate

Typically, the county's climate reflects most Midwest areas, located in the transitional zone between the humid continental climate type and the humid subtropical climate type (Köppen Dfa and Cfa, respectively), with neither large mountains nor large bodies of water to moderate its temperature. Spring is the wettest season and produces severe weather ranging from tornadoes to snow or ice storms. Summers are hot and humid, and the humidity often makes the heat index rise to temperatures feeling well above 100 °F (38 °C). Fall is mild with lower humidity and can produce intermittent bouts of heavy rainfall with the first snow flurries usually forming in late November. Winters can be cold at times with periodic light snow and temperatures below freezing.

In recent years, average temperatures in Jerseyville have ranged from a low of 17 °F (−8 °C) in January to a high of 88 °F (31 °C) in July. The record low temperature of −25 °F (−32 °C) was recorded in January 1977 and the record high temperature of 112 °F (44 °C) was recorded in July 1954. Average monthly precipitation ranges from 1.92 inches (49 mm) in January to 4.14 inches (105 mm) in April.

Adjacent counties

• Greene County - north
• Macoupin County - east
• Madison County - southeast
• St. Charles County, Missouri - south
• Calhoun County - west

Major highways

• U.S. Route 67
• Illinois Route 3
• Illinois Route 16
• Illinois Route 100
• Illinois Route 109
• Illinois Route 111
• Illinois Route 267

State protected areas

• Mississippi River State Fish and Wildlife Area
• Pere Marquette State Park

National protected areas

• Two Rivers National Wildlife Refuge (eastern portion)

Demographics

2000 census age pyramid for Jersey County

As of the 2010 United States Census, there were 22,985 people, 8,828 households, and 6,228 families residing in the county. The population density was 62.2 inhabitants per square mile (24.0/km²). There were 9,848 housing units at an average density of 26.7 per square mile (10.3/km²). The racial makeup of the county was 97.6% white, 0.4% black or African American, 0.3% Asian, 0.3% American Indian, 0.2% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 1.0% of the population. In terms of ancestry, 42.8% were German, 14.7% were Irish, 10.6% were English, and 8.6% were American.

Of the 8,828 households, 31.9% had children under the age of 18 living with them, 56.4% were married couples living together, 9.7% had a female householder with no husband present, 29.5% were non-families, and 25.0% of all households were made up of individuals. The average household size was 2.51 and the average family size was 2.98. The median age was 40.5 years.

The median income for a household in the county was $53,470 and the median income for a family was $64,773. Males had a median income of $48,750 versus $31,789 for females. The per capita income for the county was $24,368. About 5.6% of families and 8.5% of the population were below the poverty line, including 8.4% of those under age 18 and 7.1% of those age 65 or over.

Communities

Incorporated communities in Jersey County

Cities

• Grafton
• Jerseyville

Villages

• Brighton
• Elsah
• Fidelity
• Fieldon

Town

• Otterville

Unincorporated communities

Townships

Jersey County is divided into eleven townships:

Education

Unified school districts

• Alton Community Unit School District 11 - serves a very small portion of southern Jersey County (east of Elsah), along with northwestern Madison County.
• Jersey Community Unit School District 100 - serves most of Jersey County, and a small portion of southern Greene County.

High schools

• Jersey Community High School, located in Jerseyville.

Colleges and universities

• Principia College, located near Elsah.

See also

In Spanish: Condado de Jersey para niños