| Business | Phone |
| Bay St Louis Bldg & Inspection 300 S Second St, Bay St Louis 39520 | (228) 467-3081 |
| Bay St Louis Business License 111 Court St, Bay St Louis 39520 | (228) 467-9060 |
| Bay St Louis Engineering Ofc 300 S Second St, Bay St Louis 39520 | (228) 467-8527 |
| Bay St Louis Little League Bay St Louis 39520 | (228) 466-4803 |
| Bay St Louis Mc Donald Field Bay St Louis 39520 | (228) 466-4793 |
| City Yard 310 Old Spanish Trl, Bay St Louis 39520 | (228) 467-0439 |