Founded in 1836, Will County is one of 102 counties in the state of Illinois. Historically, Will County was formed from Cook and Iroquois County. The city of Joliet is the county seat. With FIPS code of 197, Will County has a population of 697,252 and area of 835 square miles (2,163 km2).
List of all cities in Will County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Ballou, IL | 60481 | 815/779 |
| Beecher, IL | 60401 | 708/464 |
| Bolingbrook, IL | 60440 | 630/331 |
| 60490 | 630/331 | |
| Braidwood, IL | 60408 | 815/779 |
| Channahon, IL | 60410 | 815/779 |
| Crest Hill, IL | 60403 | 708 |
| 60435 | 815/779 | |
| Crete, IL | 60417 | 708/464 |
| Custer Park, IL | 60481 | 815/779 |
| Downtown Station Joliet, IL | 60432 | 815/779 |
| Eagle Lake, IL | 60401 | 708/464 |
| Elwood, IL | 60421 | 815/779 |
| Frankfort, IL | 60423 | 815/779 |
| Goodenow, IL | 60401 | 708/464 |
| Homer Glen, IL | 60441 | 815/779 |
| 60491 | 815/779 | |
| Joliet, IL | 60403 | 708 |
| 60404 | 708 | |
| 60431 | 815/779 | |
| 60432 | 815/779 | |
| 60433 | 815/779 | |
| 60434 | 815/779 | |
| 60435 | 815/779 | |
| 60436 | 815/779 | |
| Lemont, IL | 60490 | 630/331 |
| Lockport, IL | 60441 | 815/779 |
| 60491 | 815/779 | |
| Lorenzo, IL | 60481 | 815/779 |
| Manhattan, IL | 60442 | 815/779 |
| Mokena, IL | 60448 | 708/464 |
| Monee, IL | 60449 | 708/464 |
| Naperville, IL | 60564 | 630/331 |
| New Lenox, IL | 60451 | 815/779 |
| Park Forest, IL | 60484 | 708/464 |
| Peotone, IL | 60468 | 708/464 |
| Plainfield, IL | 60544 | 815/779 |
| 60585 | 815/779 | |
| 60586 | 815/779 | |
| Ritchie, IL | 60481 | 815/779 |
| Rockdale, IL | 60436 | 815/779 |
| Romeoville, IL | 60446 | 815/779 |
| 60491 | 815/779 | |
| Shorewood, IL | 60404 | 708 |
| 60431 | 815/779 | |
| 60435 | 815/779 | |
| 60436 | 815/779 | |
| Sollitt, IL | 60401 | 708/464 |
| Stateville, IL | 60435 | 815/779 |
| Symerton, IL | 60481 | 815/779 |
| University Park, IL | 60484 | 708/464 |
| Wilmington, IL | 60481 | 815/779 |
| Wilton Center, IL | 60442 | 815/779 |