| Business | Phone |
| Jefferson Cnty Juvenile Prbtn Po Box H, Boulder 59632 | (406) 225-4060 |
| Jefferson Cnty Road-Rural 201 Centenial Ave, Boulder 59632 | (406) 225-4120 |
| Jefferson Cnty Sanitarian-Junk 114 S Washington Ave, Boulder 59632 | (406) 225-4126 |
| Jefferson County Appraisal 201 W Centennial St, Boulder 59632 | (406) 225-4001 |
| Jefferson County Central Shop Boulder 59632 | (406) 225-4360 |
| Jefferson County Commissioners 201 Centennial, Boulder 59632 | (406) 225-4025 |
| Jefferson County Des 110 S Washington, Boulder 59632 | (406) 225-4035 |
| Jefferson County Elections Centinneal Washigton 202, Boulder 59632 | (406) 225-4018 |
| Jefferson County General Info Boulder 59632 | (406) 225-4000 |
| Jefferson County Justice-Peace 108 South Washington, Boulder 59632 | (406) 225-4055 |
| Jefferson County Recorder 201 Centennial St, Boulder 59632 | (406) 225-4020 |
| Jefferson County Road Shop Boulder 59632 | (406) 225-4241 |
| Jefferson Cty Public Hlth Nrse 214 S Main St, Boulder 59632 | (406) 225-4231 |