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Carroll County, Illinois - Wikipedia Jump to content

Carroll County, Illinois

Coordinates: 42°04′N 89°55′W / 42.06°N 89.92°W / 42.06; -89.92
From Wikipedia, the free encyclopedia

Carroll County
County
Carroll County Courthouse
Carroll County Courthouse
Map of Illinois highlighting Carroll County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 42°04′N 89°55′W / 42.06°N 89.92°W / 42.06; -89.92
Country United States
State Illinois
Founded1839
Named afterCharles Carroll
SeatMount Carroll
Largest citySavanna
Area
 • Total
466 sq mi (1,210 km2)
 • Land445 sq mi (1,150 km2)
 • Water22 sq mi (57 km2)  4.6%
Population
 (2020)
 • Total
15,702
 • Estimate 
(2024)
15,444 Decrease[1]
 • Density35.3/sq mi (13.6/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district17th
Websitewww.carroll-county.net

Carroll County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,702.[2] Its county seat is Mount Carroll.[3]

History

[edit]

Carroll County was formed in 1839 out of Jo Daviess County. The county is named for Charles Carroll who signed the Declaration of Independence.[4] Carroll, who died in 1832, was the last signer to die.

  • Carroll County at the time of its creation in 1839
    Carroll County at the time of its creation in 1839

Geography

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According to the U.S. Census Bureau, the county has a total area of 466 square miles (1,210 km2), of which 445 square miles (1,150 km2) is land and 22 square miles (57 km2) (4.6%) is water.[5] The Mississippi Palisades State Park is in this county, just north of the city of Savanna. The Savanna Army Depot is located partly in this county.

Adjacent counties

[edit]

National protected area

[edit]

Major highways

[edit]

Climate and weather

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Mount Carroll, Illinois
Climate chart (explanation)
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14
█ Average max. and min. temperatures in °F
█ Precipitation totals in inches
Source: The Weather Channel[6]
Metric conversion
J
F
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36
 
 
−2
−14
 
 
39
 
 
2
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1
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█ Average max. and min. temperatures in °C
█ Precipitation totals in mm

In recent years, average temperatures in the county seat of Mount Carroll have ranged from a low of 7 °F (−14 °C) in January to a high of 85 °F (29 °C) in July, although a record low of −31 °F (−35 °C) was recorded in January 1910 and a record high of 108 °F (42 °C) was recorded in July 1936. Average monthly precipitation ranged from 1.43 inches (36 mm) in January to 4.77 inches (121 mm) in June.[6]

Demographics

[edit]
2000 census age pyramid for Carroll County.
Historical population
CensusPop.Note%±
18401,023—
18504,586348.3%
186011,733155.8%
187016,70542.4%
188016,9761.6%
189018,3207.9%
190018,9633.5%
191018,035−4.9%
192019,3457.3%
193018,433−4.7%
194017,987−2.4%
195018,9765.5%
196019,5072.8%
197019,276−1.2%
198018,779−2.6%
199016,805−10.5%
200016,674−0.8%
201015,387−7.7%
202015,7022.0%
2023 (est.)15,526[7]−1.1%
U.S. Decennial Census[8]
1790-1960[9] 1900-1990[10]
1990-2000[11] 2010[12]

2020 census

[edit]
Carroll County, Illinois – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
Race / Ethnicity (NH = Non-Hispanic) Pop 1980[13] Pop 1990[14] Pop 2000[15] Pop 2010[16] Pop 2020[17] % 1980 % 1990 % 2000 % 2010 % 2020
White alone (NH) 18,406 16,303 15,988 14,596 13,743 98.01% 97.01% 95.89% 94.86% 87.52%
Black or African American alone (NH) 66 110 90 122 676 0.35% 0.65% 0.54% 0.79% 4.31%
Native American or Alaska Native alone (NH) 22 28 31 35 49 0.12% 0.17% 0.19% 0.23% 0.31%
Asian alone (NH) 31 61 68 53 40 0.17% 0.36% 0.41% 0.34% 0.25%
Native Hawaiian or Pacific Islander alone (NH) x [18] x [19] 5 2 5 x x 0.03% 0.01% 0.03%
Other race alone (NH) 18 7 11 3 32 0.10% 0.04% 0.07% 0.02% 0.20%
Mixed race or Multiracial (NH) x [20] x [21] 141 139 400 x x 0.85% 0.90% 2.55%
Hispanic or Latino (any race) 236 296 340 437 757 1.26% 1.76% 2.04% 2.84% 4.82%
Total 18,779 16,805 16,674 15,387 15,702 100.00% 100.00% 100.00% 100.00% 100.00%

2010 census

[edit]

As of the 2010 United States census, there were 15,387 people, 6,622 households, and 4,343 families residing in the county.[22] The population density was 34.6 inhabitants per square mile (13.4/km2). There were 8,437 housing units at an average density of 19.0 per square mile (7.3/km2).[5] The racial makeup of the county was 96.9% white, 0.8% black or African American, 0.3% Asian, 0.3% American Indian, 0.6% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 2.8% of the population.[22] In terms of ancestry, 40.4% were German, 14.0% were Irish, 11.2% were English, and 10.6% were American.[23]

Of the 6,622 households, 26.3% had children under the age of 18 living with them, 53.1% were married couples living together, 8.2% had a female householder with no husband present, 34.4% were non-families, and 29.8% of all households were made up of individuals. The average household size was 2.29 and the average family size was 2.80. The median age was 46.5 years.[22]

The median income for a household in the county was $44,805 and the median income for a family was $55,341. Males had a median income of $42,421 versus $27,552 for females. The per capita income for the county was $25,914. About 7.8% of families and 11.7% of the population were below the poverty line, including 18.4% of those under age 18 and 5.8% of those age 65 or over.[24]

Education

[edit]

School districts include:[25]

Communities

[edit]
Community
 Community
type 		Population Total
Area 		Water
Area 		Land
Area 		Pop.
Density
Chadwick village 481 0.31 0.00 0.31 1,546.62
Lanark city 1,504 1.12 0.00 1.12 1,341.66
Milledgeville village 1,026 0.69 0.00 0.69 1,486.96
Mount Carroll (seat) city 1,479 2.00 0.00 2.00 738.39
Savanna city 2,783 2.71 0.09 2.62 1,063.84
Shannon village 801 0.48 0.00 0.48 1,661.83
Thomson village 1,610 2.22 0.00 2.22 725.55
Carroll County county 15,702 466 22 445 34

Townships

[edit]

Carroll County is divided into these twelve townships:

Census designated place

[edit]

Unincorporated Communities

[edit]

Notable people

[edit]

Politics

[edit]
United States presidential election results for Carroll County, Illinois[29]
Year Republican Democratic Third party(ies)
No.  % No.  % No.  %
1892 2,456 58.80% 1,444 34.57% 277 6.63%
1896 3,314 67.91% 1,480 30.33% 86 1.76%
1900 3,425 71.53% 1,266 26.44% 97 2.03%
1904 3,128 76.44% 691 16.89% 273 6.67%
1908 2,875 66.71% 1,129 26.19% 306 7.10%
1912 1,577 38.36% 1,098 26.71% 1,436 34.93%
1916 4,496 67.00% 1,980 29.51% 234 3.49%
1920 5,194 86.65% 606 10.11% 194 3.24%
1924 4,559 60.93% 603 8.06% 2,320 31.01%
1928 6,197 76.34% 1,876 23.11% 45 0.55%
1932 4,571 53.81% 3,812 44.87% 112 1.32%
1936 4,886 52.38% 4,368 46.83% 74 0.79%
1940 6,398 63.90% 3,592 35.87% 23 0.23%
1944 6,101 68.08% 2,843 31.72% 18 0.20%
1948 5,318 64.94% 2,809 34.30% 62 0.76%
1952 6,978 72.87% 2,584 26.98% 14 0.15%
1956 6,503 70.60% 2,693 29.24% 15 0.16%
1960 6,282 66.70% 3,097 32.88% 39 0.41%
1964 4,487 52.49% 4,062 47.51% 0 0.00%
1968 5,275 63.69% 2,558 30.89% 449 5.42%
1972 6,041 69.99% 2,571 29.79% 19 0.22%
1976 5,059 59.34% 3,372 39.55% 95 1.11%
1980 5,084 63.37% 2,154 26.85% 785 9.78%
1984 5,237 68.39% 2,398 31.31% 23 0.30%
1988 4,464 59.42% 2,990 39.80% 58 0.77%
1992 3,297 42.94% 2,854 37.17% 1,528 19.90%
1996 3,029 44.55% 2,926 43.04% 844 12.41%
2000 3,835 53.43% 3,113 43.37% 229 3.19%
2004 4,534 55.73% 3,537 43.48% 64 0.79%
2008 3,596 46.74% 3,965 51.54% 132 1.72%
2012 3,555 48.00% 3,665 49.49% 186 2.51%
2016 4,434 59.56% 2,447 32.87% 564 7.58%
2020 5,105 63.52% 2,748 34.19% 184 2.29%
2024 5,082 64.68% 2,600 33.09% 175 2.23%

As a part of Yankee-settled Northern Illinois, Carroll County became solidly Republican upon that party's formation in the 1850s. Of all the counties won by inaugural Republican Party presidential nominee John Charles Frémont in 1856, Carroll County was to maintain the longest unbroken string of supporting the GOP in subsequent elections. It would give a plurality to every subsequent Republican Presidential nominee up to George W. Bush in 2004, beating by three elections the second longest run of Indiana's Porter County which was to give a plurality to Bill Clinton in 1996.

In that 1996 election Bob Dole won Carroll County by only 1.51 percentage points – the smallest margin by a Republican to that point – and in 2008 Illinois native Barack Obama broke this last remaining GOP streak stretching back to Frémont by carrying the county by 4.80 percentage points. Obama was to repeat his win in 2012 by 1.49 percent, but a dramatic swing to Republican Donald Trump in 2016 saw him win by the largest margin since Ronald Reagan’s 1984 landslide by gaining 59.6% of the vote in Carroll County, scoring slightly higher than George H.W. Bush's victory in 1988 in which Bush won 59.4% of the vote in Carroll County.

The largest margin of victory ever in Carroll County was achieved by Warren G. Harding who won 86.7% of votes in the county during the 1920 United States presidential election.

See also

[edit]

References

[edit]
  1. ^ "County Population Totals and Components of Change: 2020–2024". United States Census Bureau. U.S. Department of Commerce. March 2025. Retrieved August 31, 2025.
  2. ^ "Carroll County, Illinois". United States Census Bureau. Retrieved June 8, 2023.
  3. ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  4. ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. pp. 70.
  5. ^ a b "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 12, 2020. Retrieved July 11, 2015.
  6. ^ a b "Monthly Averages for Mount Carroll, Illinois". The Weather Channel. Archived from the original on October 23, 2012. Retrieved January 27, 2011.
  7. ^ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023". United States Census Bureau. Retrieved April 2, 2024.
  8. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 4, 2014.
  9. ^ "Historical Census Browser". University of Virginia Library. Archived from the original on August 11, 2012. Retrieved July 4, 2014.
  10. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Archived from the original on April 24, 2014. Retrieved July 4, 2014.
  11. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Archived (PDF) from the original on December 18, 2014. Retrieved July 4, 2014.
  12. ^ "State & County QuickFacts". United States Census Bureau. Archived from the original on June 6, 2011. Retrieved July 4, 2014.
  13. ^ "1980 Census of Population - General Population Characteristics - Illinois- Table 14 - Persons by Race and Table 16 (p. 18-28) - Total Persons and Spanish Origin Persons by Type of Spanish Origin and Race (p. 29-39)" (PDF). United States Census Bureau.
  14. ^ "1990 Census of Population - General Population Characteristics - Illinois - Table 6 - Race and Hispanic Orogin" (PDF). United States Census Bureau.
  15. ^ "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Carroll County, Illinois". United States Census Bureau.
  16. ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Carroll County, Illinois". United States Census Bureau.
  17. ^ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Carroll County, Illinois". United States Census Bureau.
  18. ^ included in the Asian category in the 1980 Census
  19. ^ included in the Asian category in the 1990 Census
  20. ^ not an option in the 1980 Census
  21. ^ not an option in the 1990 Census
  22. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 11, 2015.
  23. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 11, 2015.
  24. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved July 11, 2015.
  25. ^ Geography Division (December 22, 2020). 2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Carroll County, IL (PDF) (Map). U.S. Census Bureau. Retrieved June 17, 2025. - Text list
  26. ^ 'Illinois Blue Book 1933-1934,' Biographical Sketch of John Acker, pg. 219
  27. ^ "Kansas Governor Willis Joshua Bailey". National Governors Association. Archived from the original on January 17, 2012. Retrieved September 29, 2012.
  28. ^ 'Wisconsin Blue Book 1923,' Biographical Sketch of David J. Summerville, pg. 636
  29. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Archived from the original on March 23, 2018.
[edit]

42°04′N 89°55′W / 42.06°N 89.92°W / 42.06; -89.92

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