5th most populous of 102
With 520,997 residents in 2024, Kane County ranks 5th by population among Illinois's 102 counties and is home to 4.1% of the state's residents.

Kane County has the 3rd most expensive homes in Illinois (median value $327,000) and the 4th largest immigrant share (17.2% foreign-born).
Kane County is home to 520,997 people (2024 estimate) on 519 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Pick an indicator to see its long-run evolution.
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 520,997 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 515,269 | 2010 · U.S. Census Bureau |
| Population, 2000 | 407,847 | July 1, 2000 · Census intercensal |
| Change since 2000 | +27.7% | 2000–2024 · Census |
| International migration | +2,902 | 2024 · Census Vintage 2024 |
| Domestic migration | −974 | 2024 · Census Vintage 2024 |
| Birth rate | 10.5 per 1,000 | 2024 · calculated |
| Death rate | 7.0 per 1,000 | 2024 · calculated |
| Population rank in Illinois | 5th of 102 | 2024 · calculated |
| Per capita personal income | $69,927 | BEA, 2024 · official |
| Gross domestic product | $37.1 billion | BEA, current dollars, 2024 · official |
| Median household income | $103,163 | ACS 2020–2024 5-year · official |
| Poverty rate | 7.9% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 38.1% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 17.2% | ACS 2020–2024 5-year · official |
| Median home value | $327,000 | ACS 2020–2024 5-year · official |
| Median gross rent | $1,453/month | ACS 2020–2024 5-year · official |
| Median age | 38.8 years | ACS 2020–2024 5-year · official |
| Households | 184,706 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 76.0% | ACS 2020–2024 5-year · official |
Comparable indicators for Kane County, Illinois and the United States.
| Indicator | County | Illinois | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | +0.8% | −0.9% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 10.5 | 9.9 | 10.6 | 2024 |
| Death rate (per 1,000) | 7.0 | 9.0 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 3.7 | 4.5 | 8.2 | 2024 |
| Population density (/mi²) | 1003.1 | 229.0 | 96.3 | 2024 |
| Per capita personal income | $69,927 | $74,522 | $73,204 | BEA, 2024 |
| Median household income | $103,163 | $83,390 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 7.9% | 11.8% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 38.1% | 37.8% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 17.2% | 14.7% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $327,000 | $263,300 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $1,453/month | $1,274/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 38.8 years | 39.0 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 76.0% | 67.1% | 65.2% | ACS 2020–2024 5-year |
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With 520,997 residents in 2024, Kane County ranks 5th by population among Illinois's 102 counties and is home to 4.1% of the state's residents.
Its population went from 407,847 in 2000 to 520,997 in 2024, a change of +27.7%, compared with +2.2% for Illinois as a whole.
In the year to July 2024 the county recorded 5,472 births and 3,662 deaths, so births outnumbered deaths by 1,810.
Annual Census estimates since 2000 put the county's highest population at 532,838 in 2018. The 2024 figure is 11,841 lower.
Kane County has about 1003.1 residents per square mile of land, ranking 4th of 102 counties; Illinois averages 229.0.
With a median household income of $103,163 (ACS 2020–2024 5-year), the county ranks 6th of 102 Illinois counties; the state median is $83,390.
Its economy produced $37.1 billion of GDP in 2024 (BEA), 5th largest among 102 Illinois counties.
Real GDP grew 1.9% in 2024, adjusted for inflation (BEA, chained 2017 dollars).