Founded in 1823, Morgan County is one of 102 counties in the state of Illinois. Historically, Morgan County was formed from Sangamon County. The city of Jacksonville is the county seat. With FIPS code of 137, Morgan County has a population of 32,606 and area of 568 square miles (1,471 km2).
List of all cities in Morgan County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Alexander, IL | 62601 | 217 |
| Arcadia, IL | 62650 | 217 |
| Arnold, IL | 62650 | 217 |
| Bethel, IL | 62628 | 217 |
| Chapin, IL | 62628 | 217 |
| Clements, IL | 62638 | 217 |
| Concord, IL | 62631 | 217 |
| Franklin, IL | 62638 | 217 |
| Jacksonville, IL | 62650 | 217 |
| 62651 | 217 | |
| Literberry, IL | 62660 | 217 |
| Lynnville, IL | 62650 | 217 |
| Meredosia, IL | 62665 | 217 |
| Merritt, IL | 62650 | 217 |
| Murrayville, IL | 62668 | 217 |
| Naples, IL | 62665 | 217 |
| Nortonville, IL | 62668 | 217 |
| Pisgah, IL | 62650 | 217 |
| Rees, IL | 62638 | 217 |
| Sinclair, IL | 62650 | 217 |
| Sweet Water, IL | 62665 | 217 |
| Waverly, IL | 62692 | 217 |
| Woodson, IL | 62695 | 217 |