| Business | Phone |
| Hockey Rink State, Millinocket 4462 | (207) 723-7013 |
| Sewerage Treatment Plant 197 Penobscot Ave, Millinocket 4462 | (207) 723-7040 |
| Millinocket General Assistance 197 Penobscot Ave, Millinocket 4462 | (207) 723-7010 |
| Millinocket Town Code Enfrcmnt 197 Penobscot Ave, Millinocket 4462 | (207) 723-7003 |
| Millinocket Transfer Site 20 Cedar St, Millinocket 4462 | (207) 723-7037 |
| Millinocket Waste Water Plant 20 Cedar St, Millinocket 4462 | (207) 723-7040 |
| Plain Air Flying Svc 16 Medway Rd, Millinocket 4462 | (207) 723-6649 |