The Jefferson County Jail is located in Boulder, Montana. The facility is operated and ran by the Jefferson County Sheriff’s Department.

Inmates who may be a risk to the peace will be separated from the general population pool.

If an inmate is convicted and sentenced to a sentence more than a year, they will typically be transferred to a federal prison or the Montana State Prison. Inmates who have a sentence less than a year will typically serve their time out in the Jefferson County Jail.

These inmates have been arrested in Jefferson County. However, at times, the Jefferson County Jail will also house federal inmates and inmates that are from other counties. They also house inmates who are awaiting their trial. The Jefferson County Jail does not the only house sentenced inmates.

The Jefferson County Jail will have inmates with misdemeanors to those inmates who are being convicted of rape, murder, or even robbery.

The facility is home to both adult male and adult female inmates. Majority of the inmates in the facility are either waiting for their trial to start, going through their trial, or they are waiting to be sentenced. There are a handful of inmates who have already been sentenced and serving out their time. The Jefferson County Jail is a medium-security facility.

Inmates in the Jefferson County Jail will have access to using the phone, sending and receiving letters, getting visitors, showers, three meals a day, and medical care.

Jefferson County Jail Sheriff's Office

Inmate Mailing Address

Inmate Name, ID, Housing #
Jefferson County Jail
110 South Washington PO Box 588, Boulder, MT, 59632

Jefferson County Jail Prison Information