201 W. Main
Sidney, MT 59270
8:00 am - 5:00 pm
- If any of the following days fall on a weekend, the due date is changed to the first business day following that date.
- Real property
- First payment due November 30 by 5:00 pm
- Second payment due May 31 by 5:00 pm
- Mobile home
- First payment due May 31 by 5:00 pm
- Second payment due November 30 by 5:00 pm
- Personal property
- Billed in April
- Due 30 days after sent out
- Please use this form if you wish to file a protest with your tax payment: Taxes Paid Under Protest Form
Tax information is now available online. To search, just follow the Tax Inquiries Link above.