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Boone County, Illinois

Boone County, Illinois
Map of Illinois highlighting Boone County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded 1837
Named for Daniel Boone
Seat Belvidere
Largest city Belvidere
 • Total 282 sq mi (730 km2)
 • Land 281 sq mi (728 km2)
 • Water 1.3 sq mi (3 km2), 0.5%
 • (2010) 54,165
 • Density 193/sq mi (75/km²)
Congressional district 16th
Time zone Central: UTC-6/-5
Website .org.boonecountyilwww

Boone County is a county located in the U.S. state of Illinois.As of the 2010 census, the population was 54,165.[1] Its county seat is Belvidere.[2]

Boone County is included in the Rockford, IL Metropolitan Statistical Area.


  • History 1
  • Geography 2
    • Adjacent counties 2.1
    • Major highways 2.2
  • Climate and weather 3
  • Demographics 4
  • Education 5
  • Communities 6
    • Cities 6.1
    • Villages 6.2
    • Unincorporated community 6.3
    • Townships 6.4
  • See also 7
  • References 8
  • Further reading 9
  • External links 10


Boone County was formed in 1837 out of Winnebago County. It was named for Kentucky frontiersman Daniel Boone.[3] The first non-Native American settlers arrived in what is now Boone County in 1835. They arrived as a result of the end of the Black Hawk War as well as the completion of the Erie Canal. They consisted entirely of settlers from New England. These were "Yankee" settlers, that is to say they were descended from the English Puritans who settled New England in the colonial era. They were primarily members of the Congregational Church though due to the Second Great Awakening many of them had converted to Methodism and some had become Baptists before coming to what is now Boone County. When the New England settlers arrived in what is now Boone County there was nothing but a dense virgin forest and wild prairie. In the late 1870s immigrants began arriving from Germany and Ireland.[4]


According to the U.S. Census Bureau, the county has a total area of 282 square miles (730 km2), of which 281 square miles (730 km2) is land and 1.3 square miles (3.4 km2) (0.5%) is water.[5]

Adjacent counties

Major highways

Climate and weather

Belvidere, Illinois
Climate chart ()
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[6]

In recent years, average temperatures in the county seat of Belvidere have ranged from a low of 11 °F (−12 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −29 °F (−34 °C) was recorded in January 1979 and a record high of 109 °F (43 °C) was recorded in July 1936. Average monthly precipitation ranged from 1.29 inches (33 mm) in February to 4.56 inches (116 mm) in June.[6]


2000 census age pyramid for Boone County.

As of the 2010 United States Census, there were 54,165 people, 18,505 households, and 14,273 families residing in the county.[12] The population density was 193.0 inhabitants per square mile (74.5/km2). There were 19,970 housing units at an average density of 71.1 per square mile (27.5/km2).[5] The racial makeup of the county was 84.4% white, 2.0% black or African American, 1.3% Asian, 0.4% American Indian, 9.3% from other races, and 2.6% from two or more races. Those of Hispanic or Latino origin made up 20.2% of the population.[12] In terms of ancestry, 25.6% were German, 13.7% were Irish, 9.2% were English, 8.6% were American, 7.7% were Italian, 7.1% were Swedish, and 5.0% were Polish.[13]

Of the 18,505 households, 41.5% had children under the age of 18 living with them, 61.6% were married couples living together, 10.2% had a female householder with no husband present, 22.9% were non-families, and 18.9% of all households were made up of individuals. The average household size was 2.91 and the average family size was 3.32. The median age was 36.8 years.[12]

The median income for a household in the county was $61,210 and the median income for a family was $69,380. Males had a median income of $53,581 versus $34,651 for females. The per capita income for the county was $26,105. About 7.9% of families and 10.4% of the population were below the poverty line, including 15.3% of those under age 18 and 5.0% of those age 65 or over.[14]





Unincorporated community


Boone County is divided into these nine townships:

See also


  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 3, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ History of the Origin of the Place Names in Nine Northwestern States. 1908. p. 12. 
  4. ^ The Past and Present of Boone County, Illinois: Containing a History of the County, Its Cities, Towns, Etc., a Biographical Directory of Its Citizens, War Record of Its Volunteers in the Late Rebellion, Portraits of Early Settlers and Prominent Men, General and Local Statistics, History of the Northwest, History of Illinois, Constitution of the United States, Map of Boone County, Miscellaneous Matters, Etc., Etc by H.F. Kett & Company, 1877 page 226
  5. ^ a b "Population, Housing Units, Area, and Density: 2010 - County".  
  6. ^ a b "Monthly Averages for Belvidere, Illinois". The Weather Channel. Retrieved 2011-01-27. 
  7. ^ "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015. 
  8. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 3, 2014. 
  9. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 3, 2014. 
  10. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 3, 2014. 
  11. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 3, 2014. 
  12. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data".  
  13. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates".  
  14. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates".  

Further reading

  • History of Boone County, Illinois. Salem, MA: Higginson Book Co., 1998.
  • The Past and Present of Boone County, Illinois: Containing a History of the County — Its Cities, Towns, Etc.; A Biographical Directory of Its Citizens; War Record of Its Volunteers in the Late Rebellion; Portraits of Early Settlers and Prominent Men; General and Local Statistics; History of the Northwest; History of Illinois; Constitution of the United States; Map of Boone County; Miscellaneous Matters; Etc., Etc. Chicago: H.F. Kett and Co., 1877.

External links

  • United States Census Bureau 2007 TIGER/Line Shapefiles
  • United States Board on Geographic Names (GNIS)
  • United States National Atlas

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