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Musselshell County Justice Court

Filing information for Musselshell County Justice Court in Roundup, MT. Part of the Musselshell County small claims court system.

E-Filing

Not available

Max Claim

$7,000

Courthouse Details

Musselshell County Justice Court

34 3rd Avenue West

Roundup, MT 59072

Mailing Address

PO Box 660

Roundup, MT 59072

Phone: (406) 323-1078Fax: (406) 323-1734

Area Served

Musselshell County

How to File at Musselshell County Justice Court

File in person

Bring your completed forms to the courthouse during business hours.

File by mail

Most small claims courts accept filing by mail — check with this court first. Typically you mail your completed forms with the filing fee plus a self-addressed stamped envelope for your returned copies.

Ready to take action?

A demand letter often settles disputes before a case is ever filed — and it only takes a few minutes.

Read the demand letter guide

For statewide rules, see the full Montana small claims court guide →

Data verified May 6, 2026.