The Jefferson County Jail is located in Boulder, Montana. The Jefferson County Jail is operated and managed by the Jefferson County Sheriff’s Office.

The Jefferson County Jail mission is to provide a safe and secure facility for both inmates and the staff. The facility is a medium security correctional facility.

Majority of the inmates that are already sentenced have sentences less than two years. The Jefferson County Jail accepts inmates from surrounding municipalities and towns when there are no rooms in city jails.

The Jefferson County Jail receives new inmates to the jail daily. While new inmates are coming in, there are also inmates leaving as well. Inmates are released when they post bail, placed under probation, or on their own recognizance. In 2016, the Jefferson County Jail booked over 9,500 inmates.

The Jefferson County Jail also provides a Work Center which is a separate facility that holds Work Detail Inmates and the Work Release, inmates. There are around 800 inmates housed in this facility at a given time.

All violent and out of control inmates will be separated from the general population inmates to keep the peace inside the facility at all times.

Jefferson County 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