Demographics of Olney city, Illinois

Olney city, Illinois had 8,347 people on July 1, 2025, by the Census Bureau’s estimate: −346 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Olney city, in four figures

8,347
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 8,577 ±277.; −4.0%
Change since July 2020: −346 people.; 41.0 ±2.0
Median age: ACS 2020–⁠2024.; $59,980 ±$8,256
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Olney city, Illinois's population shrank 4.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Olney city, 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).

Source: The Census Bureau

About this chart

The figures

Olney city, Illinois's population shrank 4.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Olney city, 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	8,693	100.0	100.0
2021	8,673	99.8	100.2
2022	8,525	98.1	100.7
2023	8,510	97.9	101.6
2024	8,431	97.0	102.5
2025	8,347	96.0	103.1

Population of Olney city, Illinois on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	8,693	—
2021	8,673	−20
2022	8,525	−148
2023	8,510	−15
2024	8,431	−79
2025	8,347	−84

Age, 2020–2024

The median age is 41.0 ±2.0: for men 40.2 ±3.4 and for women 41.5 ±2.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Olney city by age, ACS 2020–2024
Age	People	Share	Illinois	United States
Under 5	461 ±103	5.4% ±1.2	5.4% ±<0.1	5.6% ±<0.1
5 to 17	1,580 ±229	18.4% ±2.6	16.4% ±0.1	16.3% ±<0.1
18 to 24	619 ±136	7.2% ±1.6	9.1% ±<0.1	9.1% ±<0.1
25 to 44	2,137 ±254	24.9% ±2.8	26.9% ±0.1	26.9% ±<0.1
45 to 64	1,927 ±234	22.5% ±2.6	25.2% ±0.1	24.8% ±<0.1
65 and over	1,853 ±234	21.6% ±2.6	17.0% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $59,980 ±$8,256, and income per person $32,779 ±$3,020, in 2024 dollars. The median is $83,390 ±$362 in Illinois and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Olney city by income, ACS 2020–2024
Household income	Households	Share	Illinois	United States
Under $25,000	782 ±184	21.7% ±4.9	14.6% ±0.1	14.6% ±<0.1
$25,000 to $49,999	771 ±169	21.4% ±4.5	16.0% ±0.2	16.7% ±<0.1
$50,000 to $74,999	649 ±143	18.0% ±3.8	14.8% ±0.1	15.5% ±<0.1
$75,000 to $99,999	497 ±161	13.8% ±4.4	12.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	513 ±189	14.3% ±5.2	18.0% ±0.2	17.5% ±<0.1
$150,000 to $199,999	193 ±74	5.4% ±2.0	10.1% ±0.1	9.6% ±<0.1
$200,000 or more	93 to 295	2.6% to 8.2%	13.8% ±0.1	13.4% ±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%.

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).

2 more columns on a wider screen

Poverty rate in Olney city by age, ACS 2020–2024
Age	Below poverty	Rate	Illinois	United States
All ages	1,183 ±283	14.2% ±3.4	11.8% ±0.1	12.5% ±0.1
Under 18	302 ±137	15.0% ±6.4	15.1% ±0.2	16.1% ±0.1
18 to 59	558 ±154	13.9% ±3.7	11.0% ±0.1	11.6% ±0.1
60 and over	323 ±123	14.1% ±5.1	10.6% ±0.1	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Olney city, ACS 2020–2024
Measure	Olney city	Illinois	United States
Housing units	4,153 ±170	5,457,452 ±471	143,775,355 ±10,234
Occupied	86.7% ±4.4	92.3% ±0.1	89.9% ±0.1
Vacant	13.3% ±4.3	7.7% ±0.1	10.1% ±0.1
Owner occupied	65.4% ±4.6	67.1% ±0.3	65.2% ±0.3
Renter occupied	34.6% ±4.8	32.9% ±0.2	34.8% ±0.1
Median home value	$99,800 ±$7,908	$263,300 ±$797	$332,700 ±$236
Median gross rent	$809 ±$39	$1,274 ±$5	$1,413 ±$2
Median year built	1968 ±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

2 more columns on a wider screen

People in Olney city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Illinois	United States
Hispanic or Latino	240 ±60	2.8% ±0.7	18.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	7,867 ±272	91.7% ±1.1	58.1% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	5 to 81	0.1% to 0.9%	13.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 140	0% to 1.6%	5.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1 to 17	< 0.1% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 5	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 166	0% to 1.9%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	271 ±60	3.2% ±0.7	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).

2 more columns on a wider screen

People in Olney city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Illinois	United States
Born in the state	6,622 ±333	77.2% ±3.0	66.5% ±0.1	57.3% ±<0.1
Born in another state	1,751 ±308	20.4% ±3.5	17.5% ±0.1	26.9% ±<0.1
Born a citizen outside the states	0 to 22	0% to 0.3%	1.3% ±<0.1	1.7% ±<0.1
Born abroad	85 to 303	1.0% to 3.5%	14.7% ±0.1	14.1% ±<0.1
Naturalized citizens	3 to 95	< 0.1% to 1.1%	7.7% ±0.1	7.4% ±<0.1
Not citizens	43 to 247	0.5% to 2.9%	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%.

Olney city among the places of Illinois

254th of 337 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Illinois page.

Places of Illinois near Olney city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Clarendon Hills village	8,659 ±30
Gilberts village	8,606 ±198
Glenwood village	8,603 ±470
Rock Falls city	8,587 ±305
Monmouth city	8,581 ±285
Olney city	8,577 ±277
Hampshire village	8,524 ±708
Crete village	8,386 ±29
Harrisburg city	8,372 ±314
Maryville village	8,316 ±23
Long Grove village	8,305 ±62

Sources

Census Bureau population estimates — incorporated places and New England towns — 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

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026