Illinois Counties
Illinois, Located in the Midwest, it is home to Chicago, the third-largest city in the US. The state is a major transportation hub and an agricultural leader, known for its vast corn and soybean fields. It also plays a significant role in manufacturing and finance.. There are 102 county in Illinois. You can find the list of these counties and detailed information from the links below.
Union County
Union County, population 16,498
| County Name | Population | Cities |
|---|---|---|
| Union County | 16,498 | Union County cities |