| Business | Phone |
| Building Inspector 405 3rd St E, Thief River Fls 56701 | (218) 681-2500 |
| Old Arena 803 Barzen Ave S, Thief River Fls 56701 | (218) 681-2519 |
| Power Plant 226 Labree Ave, Thief River Fls 56701 | (218) 681-3506 |
| Power Plant Zey & Labreeamp;, Thief River Fls 56701 | (218) 681-7200 |
| Thief River Falls Billing Ofc 405 3rd St E, Thief River Fls 56701 | (218) 681-4145 |
| Thief River Falls Engineering 405 3rd St E, Thief River Fls 56701 | (218) 681-8506 |
| Thief River Falls Power & Lght 803 Barzen Ave S, Thief River Fls 56701 | (218) 681-5566 |
| Thief River Falls Priority Svc 803 Barzen Ave S, Thief River Fls 56701 | (218) 681-7200 |
| Thief River Falls Sexton Shed Greenwood Blvd, Thief River Fls 56701 | (218) 681-1570 |
| Thief River Falls Street Ofc 1121 Atlantic Ave, Thief River Fls 56701 | (218) 681-3640 |
| Thief River Falls Supt-Utlts 803 Barzen Ave S, Thief River Fls 56701 | (218) 681-5816 |
| Thief River Falls Waste Water 803 Barzen Ave S, Thief River Fls 56701 | (218) 681-4425 |
| Water Purification Plant 305 Pennington Ave, Thief River Fls 56701 | (218) 681-3809 |