Illinois is home to some of the largest counties in the United States. These counties are some of the most populous and most economically developed areas of the state. With a population of more than 12.7 million people and an area of over 54,000 square miles, Illinois is one of the most populous states in the Midwest. Below is a list of the five largest counties in Illinois by population.
Cook County is the most populous county in Illinois with over 5.2 million residents. It is located in the northeastern part of the state and includes the city of Chicago. Cook County is home to a variety of industries including transportation, finance, and manufacturing. It is also home to several major universities including the University of Chicago, Northwestern University, and University of Illinois at Chicago.
Will County is the second most populous county in the state with over 668,000 residents. It is located in the northeastern part of the state and includes the city of Joliet. Will County is an important economic hub for the state and is home to a variety of industries including automotive, manufacturing, and logistics. It is also home to several universities including Lewis University, Illinois State University, and Governors State University.
DuPage County is the third most populous county in Illinois with over 924,000 residents. It is located in the northeastern part of the state and includes the city of Naperville. DuPage County is an important economic center for the state and is home to a variety of industries including finance, technology, and pharmaceuticals. It is also home to several universities including North Central College, Benedictine University, and DeVry University.
Kane County is the fourth most populous county in Illinois with over 522,000 residents. It is located in the northeastern part of the state and includes the city of Aurora. Kane County is an important center for industry in the state and is home to a variety of industries including manufacturing, technology, and health care. It is also home to several universities including Northern Illinois University, Aurora University, and Waubonsee Community College.
Lake County is the fifth most populous county in the state with over 700,000 residents. It is located in the northeastern part of the state and includes the city of Waukegan. Lake County is an important economic center for the state and is home to a variety of industries including tourism, transportation, and healthcare. It is also home to several universities including Lake Forest College, Trinity Christian College, and College of Lake County.
