| Business | Phone |
| Opelousas Building Inspector 318 N Court St, Opelousas 70570 | (337) 948-2533 |
| Opelousas Building Inspector 350 N Court St, Opelousas 70570 | (337) 948-2533 |
| Opelousas City Judicial Adm 127 E Grolee St, Opelousas 70570 | (337) 948-2572 |
| Opelousas Civil Dept 301 N Main St, Opelousas 70570 | (337) 948-2571 |
| Opelousas Code Enforcement 318 N Court St, Opelousas 70570 | (337) 948-2583 |
| Opelousas Marshall 127 E Grolee St, Opelousas 70570 | (337) 948-2577 |
| Opelousas Meter Reader Office 318 N Court St, Opelousas 70570 | (337) 948-2582 |
| Opelousas Meter Reader Office 350 N Court St, Opelousas 70570 | (337) 948-2582 |
| Opelousas Purchasing Dept 125 E Grolee St, Opelousas 70570 | (337) 948-2522 |
| Opelousas Sewage Disposal Plnt 2284 Candy St, Opelousas 70570 | (337) 948-2558 |
| Opelousas Sewerage Dept 2284 Candy St, Opelousas 70570 | (337) 948-2557 |
| Opelousas Sewerage Dept 318 N Court St, Opelousas 70570 | (337) 948-2527 |
| Opelousas Sewerage Svc Dept 1045 S Railroad Ave, Opelousas 70570 | (337) 948-2550 |
| Opelousas Treasurer's Office 318 N Court St, Opelousas 70570 | (337) 948-2524 |
| Opelousas Treasurer's Office 350 N Court St, Opelousas 70570 | (337) 948-2524 |