Demographics of Boone County, Illinois

Boone County, Illinois had 53,568 people on July 1, 2025, by the Census Bureau’s estimate: +224 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Boone County, in four figures

53,568
Population: July 1, 2025, Vintage 2025 estimate.; +0.4%
Change since July 2020: +224 people.; 39.7 ±0.7
Median age: ACS 2020–⁠2024.; $84,571 ±$4,441
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Boone County, Illinois's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Boone County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Boone County, Illinois's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Boone County, Illinois's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	53,344	100.0	100.0
2021	53,188	99.7	100.2
2022	53,096	99.5	100.7
2023	53,352	100.0	101.6
2024	53,526	100.3	102.5
2025	53,568	100.4	103.1

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Population of Boone County, Illinois on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	53,344	−102	+21	0	−115
2021	53,188	−156	+12	−3	−184
2022	53,096	−92	−9	+15	−80
2023	53,352	+256	+83	+80	+106
2024	53,526	+174	+52	+185	−57
2025	53,568	+42	+51	−4	−3

Age, 2020–2024

The median age is 39.7 ±0.7: for men 39.2 ±1.0 and for women 40.2 ±1.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Boone County by age, ACS 2020–2024
Age	People	Share	Illinois	United States
Under 5	2,702 ±96	5.1% ±0.2	5.4% ±<0.1	5.6% ±<0.1
5 to 17	9,948 ±546	18.7% ±1.0	16.4% ±0.1	16.3% ±<0.1
18 to 24	4,900 ±460	9.2% ±0.9	9.1% ±<0.1	9.1% ±<0.1
25 to 44	12,478 ±537	23.4% ±1.0	26.9% ±0.1	26.9% ±<0.1
45 to 64	14,286 ±605	26.8% ±1.1	25.2% ±0.1	24.8% ±<0.1
65 and over	8,916 ±635	16.7% ±1.2	17.0% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $84,571 ±$4,441, and income per person $39,818 ±$1,422, in 2024 dollars. The median is $83,390 ±$362 in Illinois and $80,734 ±$166 in the United States.

Households by income

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Households in Boone County by income, ACS 2020–2024
Household income	Households	Share	Illinois	United States
Under $25,000	2,212 ±415	11.4% ±2.1	14.6% ±0.1	14.6% ±<0.1
$25,000 to $49,999	3,407 ±507	17.5% ±2.6	16.0% ±0.2	16.7% ±<0.1
$50,000 to $74,999	3,025 ±426	15.5% ±2.2	14.8% ±0.1	15.5% ±<0.1
$75,000 to $99,999	2,638 ±481	13.6% ±2.5	12.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	3,771 ±528	19.4% ±2.7	18.0% ±0.2	17.5% ±<0.1
$150,000 to $199,999	2,287 ±340	11.8% ±1.7	10.1% ±0.1	9.6% ±<0.1
$200,000 or more	2,120 ±340	10.9% ±1.7	13.8% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Boone County by age, ACS 2020–2024
Age	Below poverty	Rate	Illinois	United States
All ages	5,224 ±1,018	9.9% ±1.9	11.8% ±0.1	12.5% ±0.1
Under 18	1,922 ±432	15.6% ±3.4	15.1% ±0.2	16.1% ±0.1
18 to 59	2,357 ±568	8.4% ±2.0	11.0% ±0.1	11.6% ±0.1
60 and over	945 ±274	7.8% ±2.2	10.6% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Boone County, ACS 2020–2024
Measure	Boone County	Illinois	United States
Housing units	20,291 ±31	5,457,452 ±471	143,775,355 ±10,234
Occupied	95.9% ±1.3	92.3% ±0.1	89.9% ±0.1
Vacant	4.1% ±1.3	7.7% ±0.1	10.1% ±0.1
Owner occupied	81.8% ±2.2	67.1% ±0.3	65.2% ±0.3
Renter occupied	18.2% ±2.3	32.9% ±0.2	34.8% ±0.1
Median home value	$216,900 ±$9,736	$263,300 ±$797	$332,700 ±$236
Median gross rent	$1,041 ±$69	$1,274 ±$5	$1,413 ±$2
Median year built	1986 ±3	1971 ±2	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Boone County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Illinois	United States
Hispanic or Latino	13,651 ±0	25.6% ±<0.1	18.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	36,170 ±179	68.0% ±0.3	58.1% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	1,214 ±258	2.3% ±0.5	13.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	511 ±131	1.0% ±0.2	5.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 29	0% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 30	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	38 to 354	0.1% to 0.7%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,475 ±319	2.8% ±0.6	3.4% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Boone County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Illinois	United States
Born in the state	37,029 ±1,127	69.6% ±2.1	66.5% ±0.1	57.3% ±<0.1
Born in another state	9,926 ±965	18.6% ±1.8	17.5% ±0.1	26.9% ±<0.1
Born a citizen outside the states	126 to 416	0.2% to 0.8%	1.3% ±<0.1	1.7% ±<0.1
Born abroad	6,004 ±735	11.3% ±1.4	14.7% ±0.1	14.1% ±<0.1
Naturalized citizens	3,089 ±545	5.8% ±1.0	7.7% ±0.1	7.4% ±<0.1
Not citizens	2,915 ±535	5.5% ±1.0	7.0% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Boone County among the counties of Illinois

26th of 102 by population, July 2025. Every one is listed on the Illinois page.

Counties of Illinois near Boone County in population, July 2025
County	July 2025	Change since 2020
Vermilion County	71,259	−3.7%
Williamson County	67,225	+0.1%
Adams County	64,267	−2.1%
Whiteside County	54,121	−2.6%
Grundy County	54,052	+2.9%
Boone County	53,568	+0.4%
Jackson County	52,501	−1.5%
Ogle County	51,399	−0.7%
Henry County	48,095	−2.2%
Knox County	47,767	−4.1%
Coles County	46,607	−1.0%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026