Markham, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Markham, Illinois is 11,434 as of the 2023 American Community Survey, making it the 204th-largest city in Illinois. The median household income is $52,364, the median home value is $119,500, and the median age is 33.7.
The population has declined 10.0% since 2010 (12,546 → 11,290).
11,434
Population
2115
People / sq mi
$52,364
Median Income
$119,500
Median Home Value
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Markham covers 5.4 sq mi of land at 2115 people per square mile.
About Markham, IL
Housing cost is the defining feature of Markham: the median home is valued at $119,500. With 11,434 residents, Markham is a city in Illinois.
The typical household earns $52,364, below the US median of $78,538. Poverty is among the highest of comparable US cities: 19.8%, above the national 12.4%. Home prices sit near the bottom of the range at $119,500, with typical rent around $1,689.
Four-year-degree attainment is near the bottom of the range for US cities, 15.6%, below the national 35.0%. Remote work is below the national 14.0% at 11.0%, and the average commute runs about 34 minutes each way.
Markham city Population History (2010-2024)
The city of Markham city had a population of 12,546 in 2010 and 11,290 in 2024, a -10.0% growth over 14 years. The peak was 12,728 in 2014. Average annual growth rate: -0.74%.
11,290
Population (2024)
12,546
Population (2010)
12,728
Peak (2014)
-0.74%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 12,546 |
| 2011 | 12,616 |
| 2012 | 12,671 |
| 2013 | 12,716 |
| 2014 | 12,728 |
| 2015 | 12,690 |
| 2016 | 12,608 |
| 2017 | 12,512 |
| 2018 | 12,395 |
| 2019 | 12,314 |
| 2020 | 11,619 |
| 2021 | 11,408 |
| 2022 | 11,258 |
| 2023 | 11,216 |
| 2024 | 11,290 |
Race & Ethnicity
| White | 15.0% |
| Black or African American | 70.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.0% |
Economy & Income
$52,364
Median Household Income
$25,122
Per Capita Income
19.8%
Poverty Rate
6.4%
Unemployment Rate
Housing
$119,500
Median Home Value
$1,689
Median Rent
72.0%
Owner-Occupied
Education
87.0%
High School+
15.6%
Bachelor's+
Commute
7.7%
Drive Alone
62.0%
Public Transit
11.0%
Work From Home
34.2 min
Avg Commute
Community Profile
13.2%
Foreign Born
86.6%
Non-English at Home
3.8%
Veterans
13.8%
With Disability
90.2%
Health Insurance
95.6%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.8% |
| Information | 12.2% |
| Retail Trade | 11.2% |
| Education, Health Care & Social Services | 8.9% |
| Manufacturing | 7.8% |
| Finance, Insurance & Real Estate | 7.3% |
| Construction | 6.8% |
| Public Administration | 4.1% |
| Arts, Entertainment & Food Services | 3.7% |
| Transportation & Warehousing | 0.2% |
Largest cities in Illinois
Largest counties in Illinois
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City rankings
Frequently Asked Questions
Markham, Illinois has a population of 11,434 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 204th-largest city in Illinois.
The median household income in Markham, Illinois is $52,364, with 19.8% of residents living below the federal poverty level.
The median home value in Markham, Illinois is $119,500, with median monthly rent at $1,689 and a homeownership rate of 72.0%.
The median age in Markham, Illinois is 33.7 years. The population is 47.3% male and 52.7% female.
The population has declined 10.0% since 2010 (12,546 → 11,290).
Markham city, IL Climate
Markham city, IL has an average annual temperature of 10°C (50°F) and receives about 953 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10°C
Avg Temp
953
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 22° | 42 mm |
| February | -3° / 27° | 38 mm |
| March | 3° / 38° | 68 mm |
| April | 9° / 49° | 100 mm |
| May | 16° / 60° | 97 mm |
| June | 21° / 70° | 105 mm |
| July | 24° / 74° | 98 mm |
| August | 23° / 73° | 97 mm |
| September | 18° / 65° | 91 mm |
| October | 12° / 53° | 70 mm |
| November | 5° / 40° | 81 mm |
| December | -2° / 28° | 66 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Markham city, IL
The most comfortable months to visit Markham city, IL are typically June, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). June is usually the wettest month.
Where to stay near Markham
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.