County · Illinois

Boone County, Illinois

Boone County, Illinois. Boone County had 53,568 residents in 2025 by the Census Bureau's estimate, up 0.2% since 2020, while Illinois shrank 0.8%. It holds 19 places (7 cities, villages and boroughs, 9 towns and townships and 3 census-designated) and 10 census tracts. GEOID 17007.

Boone County is one of the 2 counties of the Rockford, IL metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

53,568

Census Bureau estimate (no margin published)
2020 Census count: 53,448 · ACS 2020-2024: 53,230

Median household income

$84,571

±$4,441 (90% margin)
Illinois: $83,390

Median home value

$216,900

±$9,736 (90% margin)
Illinois: $263,300

Median gross rent

$1,041

±$69 (90% margin)
Illinois: $1,274

How many people live in Boone County, and is it growing?

The 2020 Census counted 53,448 residents in Boone County. The Census Bureau estimates 53,568 for July 1, 2025, up 0.2% since 2020, while Illinois shrank 0.8%. The 2020-2024 American Community Survey puts the population at 53,230 over 281 square miles of land.

July 2020→2021 −156 (53,188)
2021→2022 −92 (53,096)
2022→2023 +256 (53,352)
2023→2024 +174 (53,526)
2024→2025 +42 (53,568)

Boone County in Illinois. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Boone County	Illinois	Change since 2015-2019
Total population	53,230	12,694,798	−307
Households	19,460±275	5,036,449	+889
Average household size	2.72±0.04	2.46	−0.14
Housing units	20,291±31	5,457,452	+231

Boone County's population since 2000

From 41,786 in 2000 to 53,568 in 2025: up 28.2%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 41,786
2005 (estimate) 49,725
2010 Census 54,165
2015 (estimate) 53,571
2020 Census 53,448
2025 (estimate) 53,568

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Boone County?

Boone County holds 19 places: 7 cities, villages and boroughs (incorporated places), 9 towns and townships (county subdivisions with their own government) and 3 census-designated places. The largest is Belvidere Township with 29,501 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Boone County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Belvidere Township	township	29,441	29,286±28	$76,622	$198,300	11.4%	100%
Belvidere	city	25,339	24,752±563	$64,528	$158,900	14.6%	100%
Caledonia Township	township	7,294	7,239±24	$104,492	$240,400	4.2%	100%
Poplar Grove Township	township	5,131	5,150±32	$110,647	$221,000	7.8%	100%
Candlewick Lake	CDP	5,115	5,448±490	$86,146	$172,300	10.0%	100%
Poplar Grove	village	5,049	3,923±598	$120,278	$270,700	3.7%	100%
Bonus Township	township	4,375	4,363±15	$100,806	$258,200	10.5%	100%
Flora Township	township	2,994	2,988±17	$53,654	$153,100	15.6%	100%
Boone Township	township	1,993	2,108±403	$98,438	$164,900	6.9%	100%
Loves Park	city	23,397	23,502±472	$61,868	$160,400	14.4%	7%
Capron	village	1,395	1,311±388	$90,192	$160,100	8.9%	100%
Timberlane	village	906	1,278±355	$147,308	$351,000	0.8%	100%
Manchester TownshipGEOID 1700746318	township	871	697±204	$105,750	$412,500	2.6%	100%
Spring TownshipGEOID 1700771578	township	864	1,009±398	$135,595	$277,600	16.4%	100%
LeRoy TownshipGEOID 1700742951	township	485	390±149	$95,208	$461,100	2.1%	100%
Cherry Valley	village	2,905	3,749±570	$74,655	$232,800	8.3%	12%
Garden PrairieGEOID 1728612	CDP	300	403±291	$68,319	$186,400	0.0%	100%
CaledoniaGEOID 1710422	village	183	226±87	$88,571	$163,200	8.4%	100%
ArgyleGEOID 1702050	CDP	332	324±159	$139,632	$277,400	0.0%	33%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Boone County?

The median resident of Boone County is 39.7 years old; 23.8% are under 18 and 16.7% are 65 or older. The largest group is non-Hispanic white residents at 68.0%, then Hispanic or Latino residents (of any race) at 25.6%. 11.3% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Boone County	Illinois	Change since 2015-2019
Median age	39.7±0.7	39.0	+1.2
Under 18 years	23.8%±0.1 pts	21.8%	–
65 years and over	16.7%±0.2 pts	17.0%	–
Hispanic or Latino (any race)	25.6%	18.8%	+3.8 pts
White alone, not Hispanic	68.0%±0.3 pts	58.1%	−5.0 pts
Black or African American alone, not Hispanic	2.3%±0.5 pts	13.3%	no clear change
Asian alone, not Hispanic	1.0%±0.2 pts	5.9%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.0%±0.1 pts	0.1%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.1 pts	0.0%	–
Two or more races, not Hispanic	2.8%±0.6 pts	3.4%	–
Some other race alone, not Hispanic	0.4%±0.3 pts	0.4%	–
Born outside the United States	11.3%±1.4 pts	14.7%	no clear change
Speak a language other than English at home (age 5+)	20.6%±2.0 pts	24.0%	–
Civilian veterans (age 18+)	5.7%±0.9 pts	4.8%	–
With a disability	13.4%±1.4 pts	12.1%	–
No health insurance coverage	5.6%±1.4 pts	6.9%	no clear change
High school graduate or higher (age 25+)	86.2%±1.7 pts	90.5%	–
Bachelor's degree or higher (age 25+)	23.6%±2.1 pts	37.8%	no clear change
Graduate or professional degree (age 25+)	9.4%±1.3 pts	15.3%	–
Moved from another state in the past year	0.9%±0.6 pts	1.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Boone County earn?

Half of Boone County's 19,460 households earn less than $84,571 a year (±$4,441), against $83,390 in Illinois. In 2015-2019 it was $85,253 in 2024 dollars; the margins of error cannot tell the two periods apart. 9.9% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Boone County	Illinois	Change since 2015-2019
Median household income	$84,571±$4,441	$83,390	no clear change
Mean household income	$106,291±$4,485	$115,638	–
Per capita income	$39,818±$1,422	$46,406	no clear change
People below the poverty line	9.9%±1.9 pts	11.8%	no clear change
Children under 18 below the poverty line	15.6%±4.1 pts	15.1%	no clear change
Households receiving SNAP	14.3%±2.3 pts	13.8%	–
Households with a broadband subscription	91.2%±1.7 pts	90.8%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Boone County?

Owners occupy 81.8% of Boone County's occupied homes and renters 18.2%. The median owner-occupied home is valued at $216,900 by its owner (±$9,736). The median renter pays $1,041 a month including utilities, and 37.0% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Boone County	Illinois	Change since 2015-2019
Median home value (owner-occupied)	$216,900±$9,736	$263,300	+$28,112
Median gross rent	$1,041±$69	$1,274	no clear change
Renters paying 35% or more of income on rent	37.0%±9.3 pts	39.0%	no clear change
Median monthly owner costs, with a mortgage	$1,635±$62	$1,987	–
Owner-occupied homes	81.8%±2.2 pts	67.1%	no clear change
Housing units	20,291±31	5,457,452	+231
Homeowner vacancy rate	0.6%±0.6 pts	1.0%	–
Rental vacancy rate	4.1%±3.6 pts	5.0%	–
Single-family detached homes	78.2%±2.2 pts	58.2%	–
Mobile homes	6.0%±1.3 pts	2.3%	–
Built 2020 or later	0.8%±0.4 pts	0.7%	–
Built 1939 or earlier	17.4%±2.4 pts	20.2%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is Boone County building?

Builders took permits for 68 new housing units across Boone County in 2025 (54 single-family), 1.3 per 1,000 residents.

2019 50 units
2020 43 units
2021 108 units
2022 129 units
2023 29 units
2024 52 units
2025 68 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Boone County get to work?

78.8% of Boone County's workers drive alone and 9.6% work from home. The average trip to work takes 26.6 minutes. The unemployment rate in 2020-2024 averaged 7.4%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Boone County	Illinois	Change since 2015-2019
In the labor force (age 16+)	65.8%±1.7 pts	65.0%	–
Unemployment rate	7.4%±1.5 pts	5.8%	no clear change
Drove alone to work	78.8%±2.5 pts	65.9%	–
Carpooled	9.7%±1.9 pts	7.8%	–
Public transportation	0.3%±0.3 pts	5.8%	–
Walked	1.0%±0.6 pts	2.8%	–
Worked from home	9.6%±2.0 pts	15.9%	+4.5 pts
Mean travel time to work	26.6 min±1.2	27.8 min	−2.1 min

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are Boone County's census tracts?

Boone County is divided into 10 census tracts. Among those with a reliable estimate, median household income runs from $42,331 (Tract 102) to $163,188 (Tract 105.01).

Census tracts of Boone County, ACS 2020-2024 5-year estimates; sort by any column

Tract 101.0117007010101	Belvidere (88%)	4,396	4,594±606	$79,750	$190,800	$1,126	20.9%
Tract 101.0217007010102	Belvidere (86%)	3,756	4,826±935	$62,024	$150,800	$909	10.9%
Tract 10217007010200	Belvidere (96%)	5,640	5,511±816	$42,331	$158,500	$852	17.4%
Tract 10317007010300	Belvidere (98%)	6,674	5,942±544	$59,504	$124,700	$1,159	12.4%
Tract 10417007010400	Belvidere (28%)	6,912	6,778±601	$87,066	$240,000	$1,500	14.2%
Tract 105.0117007010501	Loves Park (6%)	4,501	4,944±375	$163,188	$370,500	not published	1.3%
Tract 105.0217007010502	Belvidere (15%)	5,795	5,051±499	$97,778	$306,500	not published	4.5%
Tract 106.0117007010601	Capron (17%)	3,847	3,487±401	$96,250	$290,800	$1,133	6.0%
Tract 106.0317007010603	Poplar Grove (32%)	6,380	6,387±475	$134,747	$279,000	$1,488	1.1%
Tract 106.0417007010604	Candlewick Lake (79%)	5,547	5,710±481	$79,056	$170,300	$1,530	10.4%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Boone County compare with Illinois's other counties?

Boone County's rank among Illinois's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	25th of 102
Growth 2020-2025	15th of 102
Residents per square mile	16th of 102
Median household income	13th of 102
Median home value	11th of 102
Median gross rent	15th of 102
Poverty rate	76th of 102
Bachelor's degree or higher	35th of 102
Median age	83rd of 102

Every county in Illinois

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for Boone County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.