| Business | Phone |
| Phelps County Addressing 200 N Main St, Rolla 65401 | (573) 458-6142 |
| Phelps County Assoc Circuit Ct 200 N Main St # 201, Rolla 65401 | (573) 364-1891 |
| Phelps County Community Svc Rolla 65401 | (573) 458-6069 |
| Phelps County Extension 200 N Main St, Rolla 65401 | (573) 458-6260 |
| Phelps County Juvenile Dept 200 N Main St, Rolla 65401 | (573) 458-6075 |
| Phelps County Office 200 N Main St, Rolla 65401 | (573) 458-6000 |
| Phelps County Prosecutor 200 N Main St, Rolla 65401 | (573) 458-6170 |
| Phelps County Public Adm 1 Mcfarland Dr, Rolla 65401 | (573) 458-6080 |
| Phelps County Recorder 200 N Main St, Rolla 65401 | (573) 458-6095 |
| Phelps County Rsvp 200 N Main St, Rolla 65401 | (573) 458-6189 |
| Phelps County Senior Companion 200 N Main St, Rolla 65401 | (573) 458-6180 |
| Phelps County Casa Rolla 65401 | (573) 458-6240 |
| Phelps County Circuit Clerk 200 N Main St # 201, Rolla 65401 | (573) 458-6210 |
| Phelps County Collector 200 N Main St, Rolla 65401 | (573) 458-6155 |
| University Extension Center Rolla 65401 | (573) 341-4955 |