| Business | Phone |
| Oglala Porcupine Cap Office Po Box 217, Porcupine 57772 | (605) 867-5728 |
| Oglala Porcupine Parent Child Po Box 279, Porcupine 57772 | (605) 867-5748 |
| Oglala Sioux Community Rltns Porcupine 57772 | (605) 867-6062 |
| Oglala Sioux Health Education Porcupine 57772 | (605) 867-5730 |