Founded in 1823, Lafayette Parish is one of 64 parishes in the state of Louisiana. Historically, Lafayette Parish was formed from part of St. Martin Parish. The city of Lafayette is the parish seat. With FIPS code of 55, Lafayette Parish has a population of 244,205 and area of 270 square miles (699 km2).
List of all cities in Lafayette Parish, LA alphabetically
| City/Town | Postal Code | Area Code |
| Broussard, LA | 70518 | 337 |
| Carencro, LA | 70520 | 337 |
| Duson, LA | 70529 | 337 |
| Energy Center, LA | 70598 | 337 |
| Lafayette, LA | 70500 | 337 |
| 70501 | 337 | |
| 70502 | 337 | |
| 70503 | 337 | |
| 70504 | 337 | |
| 70505 | 337 | |
| 70506 | 337 | |
| 70507 | 337 | |
| 70508 | 337 | |
| 70509 | 337 | |
| 70593 | 337 | |
| 70595 | 337 | |
| 70596 | 337 | |
| 70598 | 337 | |
| Milton, LA | 70558 | 337 |
| Scott, LA | 70583 | 337 |
| Youngsville, LA | 70592 | 337 |