  | County Attorney | The County Attorney is the chief legal officer for Stillwater County. |
| | Full-Time (Hourly) | |
| | Justice Court | |
| | Library | Stillwater County Library is a full-service public library located in Columbus, Montana. Books, audiobooks, DVDs, CDs, and magazines, newspapers, public access computers, free wi-fi, printing, copying, and faxing services available. |
| | Montana State University Extension | Land-grant universities like Montana State University have a third critical mission- reaching out and “extending” resources, solving public needs with university resources through a non-formal, non-credit program. |
| | Planning | Stillwater County’s Planning Office exists to serve the citizens and local governments of Stillwater County by providing planning services for land use, community growth, and change. |
| | Road and Bridge | |
| | Sheriff | The Sheriff and command staff manage the day-to-day investigations, evidence management, civil process, and a number of support operations necessary to provide full law enforcement coverage and services for Stillwater County. |
| | Solid Waste | Stillwater County Solid Waste District was formed in 1975 to provide a system where residents could work together to provide solid waste disposal services. |
| | Transit | Transit for Stillwater County |
| | Treasurer | The office of the Treasurer receives and disburses all monies, as dictated by state law, and records these transactions. |
| | Weed District | Stillwater County Weed District will work to establish partnerships throughout the region with agencies, institutions, and the private sector in order to promote cooperative weed management projects. |