| Business | Phone |
| Balderrama Community Center 709 San Diego St, Oceanside 92054 | (760) 435-5216 |
| Beach Community Center 300 N The Strand, Oceanside 92054 | (760) 435-5233 |
| Senior Citizens Community Center 455 Country Club Ln, Oceanside 92054 | (760) 435-5250 |
| San Luis Rey Wastewater Plant Oceanside 92054 | (760) 435-5960 |
| Pier Plaza Amphitheater 200 N The Strand, Oceanside 92054 | (760) 435-5540 |
| Oceanside Building Dept 300 N Coast Hwy, Oceanside 92054 | (760) 435-3950 |
| Oceanside City Adm 300 N Coast Hwy, Oceanside 92054 | (760) 435-3065 |
| Oceanside City Engineering 300 N Coast Hwy, Oceanside 92054 | (760) 966-4747 |
| Oceanside City Planning 300 N Coast Hwy, Oceanside 92054 | (760) 966-4770 |
| Oceanside Engineering Dept Oceanside 92054 | (760) 435-5099 |
| Oceanside Harbor & Beaches 1540 Harbor Dr N, Oceanside 92054 | (760) 435-4000 |
| Oceanside Housing 321 N Nevada St, Oceanside 92054 | (760) 966-4585 |
| Oceanside Housing Dept 321 N Nevada St, Oceanside 92054 | (760) 435-3360 |
| Oceanside Lifeguard Svc 301 N The Strand, Oceanside 92054 | (760) 435-4018 |
| Oceanside Personnel Dept Oceanside 92054 | (760) 435-3500 |
| Oceanside Planning Dept Oceanside 92054 | (760) 435-3520 |
| North County Humane Society 2905 San Luis Rey Rd, Oceanside 92054 | (760) 757-4357 |
| North River Road Community Center 5306 N River Rd, Oceanside 92057 | (760) 435-5550 |