| Business | Phone |
| Duval County Appraisal Dist 100 W Gravis St, San Diego 78384 | (361) 279-3305 |
| Duval County Courthouse 400 E Gravis St, San Diego 78384 | (361) 539-4688 |
| Duval County Rural Housing 406 E Gravis St, San Diego 78384 | (361) 279-3322 |
| Duval County Senior Citizens 210 E Gravis St, San Diego 78384 | (361) 279-3322 |
| Duval County Sewer Plant Fm 272, San Diego 78384 | (361) 279-2888 |
| Duval County Shop Precinct 1 709 W Collins Ave, San Diego 78384 | (361) 279-3356 |
| Duvall County 911 Addressing 401 E Collins, San Diego 78384 | (361) 279-7270 |
| Administrative Supervisors Ofc Courthouse, San Diego 78384 | (361) 279-8247 |