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Henry County, Illinois facts for kids

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Henry County
Henry County Courthouse
Henry County Courthouse
Map of Illinois highlighting Henry County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Country  United States
State  Illinois
Founded January 13, 1825
Named for Patrick Henry
Seat Cambridge
Largest city Kewanee
Area
 • Total 826 sq mi (2,140 km2)
 • Land 823 sq mi (2,130 km2)
 • Water 2.7 sq mi (7 km2)  0.3%
Population
 (2020)
 • Total 49,284
 • Estimate 
(2023)
48,448 Decrease
 • Density 59.67/sq mi (23.037/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional districts 16th, 17th

Henry County is a place in Illinois, a state in the United States. It's like a big district or area within the state. In 2020, about 49,284 people lived here. The main town where the county government is located is called Cambridge. Henry County is also part of a larger area known as the Quad Cities, which includes cities like Davenport, Moline, and Rock Island.

History of Henry County

Henry County was officially created on January 13, 1825. It was formed from a part of Fulton County, Illinois. The county is named after Patrick Henry, a very important person during the American Revolutionary War. He was known for his strong speeches about freedom and individual rights. He famously said, "Give me liberty, or give me death!"

Early settlers came to Henry County from places like New England and western New York. Many of these people were descendants of English Puritans who had settled in New England a long time ago. These New England settlers helped start five towns in the county: Andover, Wethersfield, Geneseo, Morristown, and La Grange.

The town of Cambridge started in 1843. A person named Rev. Ithamar Pillsbury owned the land there. He decided to set aside some of his property for a town. People bought pieces of land, and building the town began on June 9, 1843. These early settlers from New England made Henry County feel a lot like the culture of early New England.

Geography and Climate

Henry County covers a total area of 826 square miles. Most of this area, 823 square miles, is land, and a small part (2.7 square miles) is water. It is the 29th largest county in Illinois. The land in Henry County is mostly flat. The height above sea level ranges from about 650 feet in the northwest to 850 feet in the southeast. A large part of the county, about 86.7% of its land, is used for farming.

Weather in Cambridge

Weather chart for Cambridge, Illinois
J F M A M J J A S O N D
 
 
1.5
 
29
13
 
 
1.6
 
35
19
 
 
2.7
 
47
30
 
 
3.7
 
61
40
 
 
4.2
 
73
52
 
 
4.2
 
82
61
 
 
3.9
 
86
66
 
 
4.3
 
83
63
 
 
3.3
 
76
55
 
 
3
 
63
43
 
 
2.8
 
47
31
 
 
2.2
 
33
19
temperatures in °F
precipitation totals in inches
source: The Weather Channel

The weather in Henry County changes throughout the year. In Cambridge, the county seat, average temperatures can be as low as 13 degrees Fahrenheit in January. In July, they can reach a high of 86 degrees Fahrenheit. The coldest temperature ever recorded was -24 degrees Fahrenheit in February 1996. The hottest was 103 degrees Fahrenheit in July 1983. The amount of rain and snow also changes. January usually gets about 1.52 inches, while August gets the most, with about 4.32 inches.

Main Roads

  • I-74.svg Interstate 74
  • I-80.svg Interstate 80
  • I-280.svg Interstate 280
  • US 6.svg U.S. Highway 6
  • US 34.svg U.S. Highway 34
  • US 150.svg U.S. Highway 150
  • Illinois 17.svg Illinois Route 17
  • Illinois 78.svg Illinois Route 78
  • Illinois 81.svg Illinois Route 81
  • Illinois 82.svg Illinois Route 82
  • Illinois 84.svg Illinois Route 84
  • Illinois 91.svg Illinois Route 91
  • Illinois 92.svg Illinois Route 92

Neighboring Counties

People of Henry County

Historical population
Census Pop.
1830 41
1840 1,260 2,973.2%
1850 3,807 202.1%
1860 20,660 442.7%
1870 35,506 71.9%
1880 36,597 3.1%
1890 33,338 −8.9%
1900 40,049 20.1%
1910 41,736 4.2%
1920 45,162 8.2%
1930 43,851 −2.9%
1940 43,798 −0.1%
1950 46,492 6.2%
1960 49,317 6.1%
1970 53,217 7.9%
1980 57,968 8.9%
1990 51,159 −11.7%
2000 51,020 −0.3%
2010 50,486 −1.0%
2020 49,284 −2.4%
2023 (est.) 48,448 −4.0%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010
USA Henry County, Illinois age pyramid
2000 census age pyramid for Henry County

In 2010, there were about 50,486 people living in Henry County. Most people (94.8%) were white. Smaller groups included Black or African American people (1.6%), Asian people (0.4%), and American Indian people (0.2%). About 4.8% of the population was of Hispanic or Latino background.

Many people in Henry County have ancestors from different parts of the world. For example, 30% had German ancestors, 14.6% had Irish ancestors, 12.3% had Swedish ancestors, and 11.5% had English ancestors. About 7.2% identified their ancestry as American.

The average age of people in the county was 41.8 years old. Families living in the county earned a median income of about $61,467 per year.

Towns and Villages

Henry County has many different communities, from larger cities to smaller villages and unincorporated areas.

Cities

Towns

Villages

Unincorporated Communities

These are smaller areas that are not officially part of a city, town, or village.

  • Aliceville
  • Briar Bluff
  • Brook Lawn
  • Dayton
  • German Corner
  • Green River
  • Green Rock
  • Hickory Hills
  • Level Acres
  • Lynn Center
  • Morristown
  • Nekoma
  • Opheim
  • Osco
  • Shady Beach
  • Sunny Hill
  • Sunny Hill Estates
  • Timber Ridge
  • Ulah
  • Warner
  • Woodcrest

Former Communities

These are places that used to be communities but are no longer active towns or villages.

  • Kedron
  • Oxford
  • Saxon

Townships

Henry County is divided into many smaller areas called townships.

  • Alba
  • Andover
  • Annawan
  • Atkinson
  • Burns
  • Cambridge
  • Clover
  • Colona
  • Cornwall
  • Edford
  • Galva
  • Geneseo
  • Hanna
  • Kewanee
  • Loraine
  • Lynn
  • Munson
  • Osco
  • Oxford
  • Phenix
  • Weller
  • Western
  • Wethersfield
  • Yorktown

See also

Kids robot.svg In Spanish: Condado de Henry (Illinois) para niños

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Henry County, Illinois Facts for Kids. Kiddle Encyclopedia.