What is the largest county in Illinois?
Cook County is the largest county in Illinois with a population of 5,185,812, according to Census ACS 5-Year.
Context
Illinois has 102 counties.
Top 10
| Cook County | 5,185,812 |
| DuPage County | 927,263 |
| Lake County | 711,885 |
| Will County | 698,450 |
| Kane County | 516,097 |
Explore Further
Related Questions
What is the population of Illinois?What is the median household income in Illinois?What is the median home value in Illinois?What is the largest city in Illinois?What is the cheapest city in Illinois?What are the demographics of Illinois?What is the cost of living in Illinois?Is Illinois growing or shrinking?
Frequently Asked Questions
Cook County is the largest county in Illinois with a population of 5,185,812, according to Census ACS 5-Year.