Demographics of Markham city, Illinois

Markham city, Illinois had 11,274 people on July 1, 2025, by the Census Bureau’s estimate: −345 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Markham city, in four figures

11,274
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 11,355 ±28.; −3.0%
Change since July 2020: −345 people.; 34.2 ±2.4
Median age: ACS 2020–⁠2024.; $57,302 ±$12,364
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.

Markham city, Illinois's population shrank 3.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Markham 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).

U.S. Census Bureau — Census Bureau population estimates — incorporated places and New England towns

About this chart

The figures

Markham city, Illinois's population shrank 3.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Markham 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	11,619	100.0	100.0
2021	11,413	98.2	100.2
2022	11,250	96.8	100.7
2023	11,224	96.6	101.6
2024	11,296	97.2	102.5
2025	11,274	97.0	103.1

Population of Markham city, Illinois on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	11,619	—
2021	11,413	−206
2022	11,250	−163
2023	11,224	−26
2024	11,296	+72
2025	11,274	−22

Age, 2020–2024

The median age is 34.2 ±2.4: for men 29.5 ±3.9 and for women 37.9 ±4.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Markham city by age, ACS 2020–2024
Age	People	Share	Illinois	United States
Under 5	882 ±279	7.8% ±2.5	5.4% ±<0.1	5.6% ±<0.1
5 to 17	2,164 ±393	19.1% ±3.5	16.4% ±0.1	16.3% ±<0.1
18 to 24	1,091 ±320	9.6% ±2.8	9.1% ±<0.1	9.1% ±<0.1
25 to 44	3,181 ±479	28.0% ±4.2	26.9% ±0.1	26.9% ±<0.1
45 to 64	2,374 ±326	20.9% ±2.9	25.2% ±0.1	24.8% ±<0.1
65 and over	1,663 ±297	14.6% ±2.6	17.0% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $57,302 ±$12,364, and income per person $25,372 ±$2,535, 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 Markham city by income, ACS 2020–2024
Household income	Households	Share	Illinois	United States
Under $25,000	768 ±248	21.0% ±6.6	14.6% ±0.1	14.6% ±<0.1
$25,000 to $49,999	635 ±203	17.4% ±5.4	16.0% ±0.2	16.7% ±<0.1
$50,000 to $74,999	760 ±240	20.8% ±6.4	14.8% ±0.1	15.5% ±<0.1
$75,000 to $99,999	455 ±158	12.4% ±4.2	12.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	566 ±182	15.5% ±4.8	18.0% ±0.2	17.5% ±<0.1
$150,000 to $199,999	284 ±120	7.8% ±3.2	10.1% ±0.1	9.6% ±<0.1
$200,000 or more	187 ±92	5.1% ±2.5	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 Markham city by age, ACS 2020–2024
Age	Below poverty	Rate	Illinois	United States
All ages	2,019 ±684	18.0% ±6.1	11.8% ±0.1	12.5% ±0.1
Under 18	563 ±267	19.5% ±8.6	15.1% ±0.2	16.1% ±0.1
18 to 59	1,046 ±396	16.9% ±6.1	11.0% ±0.1	11.6% ±0.1
60 and over	410 ±187	19.4% ±8.2	10.6% ±0.1	11.0% ±<0.1

Housing, 2020–2024

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Housing in Markham city, ACS 2020–2024
Measure	Markham city	Illinois	United States
Housing units	3,954 ±263	5,457,452 ±471	143,775,355 ±10,234
Occupied	92.4% ±2.4	92.3% ±0.1	89.9% ±0.1
Vacant	7.6% ±3.1	7.7% ±0.1	10.1% ±0.1
Owner occupied	74.9% ±6.6	67.1% ±0.3	65.2% ±0.3
Renter occupied	25.1% ±6.6	32.9% ±0.2	34.8% ±0.1
Median home value	$135,300 ±$13,168	$263,300 ±$797	$332,700 ±$236
Median gross rent	$1,621 ±$176	$1,274 ±$5	$1,413 ±$2
Median year built	1964 ±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 Markham city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Illinois	United States
Hispanic or Latino	2,025 ±549	17.8% ±4.8	18.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	1,047 ±425	9.2% ±3.7	58.1% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	7,994 ±582	70.4% ±5.1	13.3% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 120	0% to 1.1%	5.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 20	0% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 20	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 20	0% to 0.2%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	67 to 419	0.6% to 3.7%	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).

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People in Markham city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Illinois	United States
Born in the state	8,989 ±585	79.2% ±5.1	66.5% ±0.1	57.3% ±<0.1
Born in another state	1,405 ±431	12.4% ±3.8	17.5% ±0.1	26.9% ±<0.1
Born a citizen outside the states	0 to 142	0% to 1.3%	1.3% ±<0.1	1.7% ±<0.1
Born abroad	897 ±320	7.9% ±2.8	14.7% ±0.1	14.1% ±<0.1
Naturalized citizens	111 to 383	1.0% to 3.4%	7.7% ±0.1	7.4% ±<0.1
Not citizens	650 ±281	5.7% ±2.5	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%.

Markham city among the places of Illinois

204th 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 Markham city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
River Forest village	11,992 ±46
Kewanee city	11,913 ±445
Centralia city	11,856 ±176
Troy city	11,647 ±162
Schiller Park village	11,393 ±27
Markham city	11,355 ±28
Pontiac city	11,294 ±294
Burr Ridge village	11,141 ±36
Fox Lake village	11,131 ±492
Waterloo city	11,129 ±38
Columbia city	11,127 ±176

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

Data retrieved September 25, 2026