Founded in 1807, St. John the Baptist Parish is one of 64 parishes in the state of Louisiana. Historically, St. John the Baptist Parish was one of the original 19 parishes. The city of Edgard is the parish seat. With FIPS code of 95, St. John the Baptist Parish has a population of 42,094 and area of 348 square miles (901 km2).
List of all cities in Saint John the Baptist Parish, LA alphabetically
| City/Town | Postal Code | Area Code |
| Belle Point, LA | 70084 | 985 |
| Edgard, LA | 70049 | 985 |
| Garyville, LA | 70051 | 985 |
| 70076 | 985 | |
| La Place, LA | 70068 | 985 |
| 70069 | 985 | |
| 70068 | 985 | |
| Laplace, LA | 70069 | 985 |
| Lions, LA | 70084 | 985 |
| Montz, LA | 70068 | 985 |
| Mount Airy, LA | 70051 | 985 |
| 70076 | 985 | |
| Reserve, LA | 70084 | 985 |
| Wallace, LA | 70049 | 985 |