Jefferson County Jail, MT Prison Roster, Online Inmate Search

Updated on: May 16, 2024
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Jefferson County Jail


110 South Washington PO Box 588, Boulder, MT, 59632

Jefferson County Jail inmate lookup: Aliases, Bond, Complaint, Charges, Inmate Roster, Race, Who's in jail, Bookings, Current Housing Block, Mugshots, Status, Current Housing Block, Booking Date, Personal Description, Race, Gender, Arrests, Commitment Date, Height, Release Date, Current Housing Block, Charges, Case #, Charges.

Use this website for informational purposes only.

The Jefferson County Jail houses inmates that have been charged with state or federal charges. Some inmates are in the pre-trial stages and other have been convicted of a crime.

This site is not owned or operated by any state government agency, read more.

Jefferson County Jail — General Information

Facility Name Jefferson County Jail
Facility Type County Jail
Address 110 South Washington PO Box 588, Boulder, MT, 59632
Phone 406-225-4075
City Boulder
Postal Code 59632
State Montana
County Jefferson County
Official Website

Jefferson County Sheriffs Office And Detention Center

Address 110 South Washington Street, Boulder, Montana, 59632
Phone 406-225-4075
Fax 406-225-4145

Inmate Search

Nationwide Inmate Search

Arrests, Warrant, Docket, Mugshot.

For a list of current inmates, click here. You can also call 406-225-4075 if you have any additional questions about a particular inmate.

Sending a Mail/Care Package

You can only send mail for inmates at the Jefferson County Jail via the US Postal Service. Do not use UPS, FEDEX, or any other third-party shipping provider. In addition to the inmate’s information, also include the sender’s name and address on the envelope. Without the sender’s information, the mail will be discarded and not passed on to the inmate.

Address the mail to:

(Inmate's Complete Name)
Jefferson County Jail
110 South Washington PO Box 588, Boulder, MT, 59632

Sending Money

The easiest way to send money to an inmate is to do it online. From that webpage, you select from the different drop down menus, choosing “Montana” and “Jefferson County.” After you identify the inmate, you will be able to safely and securely deposit money into an inmate’s account easily.

Phone calls

Any money you despite can be used for an inmate's commissary account. The inmate at the Jefferson County Jail can either purchase commissary items or make phone calls. In addition to the inmate’s commissary account, you can deposit money with the inmate telephone provider, which will allow the inmate to call you collect and have the charges paid from this account. You can make a deposit to a telephone account here.

Inmates cannot receive incoming calls, but can make outgoing calls with the prepaid account or by calling collect.


Video Visits are conducted in the Jefferson County Jail lobby on video terminals. Inmates can receive up to 2 20 minute visits per week. In order to make sure the inmate isn’t exceeding his limits, you should plan your visit ahead of time.

Adults need to visit separately, unless they are the parents of the inmate. Children can only visit if a parent comes with them. Plan to bring valid identification and dress conservatively.

Plan your visit during one of these timeframes:

On-site Visitation Hours

Friday & Saturday: No Visitation hours

Visiting Hours

Monday — 7:30 AM to 9:00 PM
Tuesday — 7:30 AM to 9:00 PM
Wednesday — 7:30 AM to 9:00 PM
Thursday — 7:30 AM to 9:00 PM
Friday — 7:30 AM to 9:00 PM
Saturday — 7:30 Am to 2:30 PM
Sunday — 7:30 Am to 2:30 PM


Refer the map below to find the driving directions.

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