2026 Property Tax Due Dates
November 30
First installment
May 31
Second installment
Payment Methods
Online, Mail, In-Person
Big Horn County Treasurer
Treasurer
Denise Rios
Phone
(406) 665-9837Fax
(406) 665-9838
Mailing Address
PO Box 908
Hardin, MT 59034
Office Hours
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Big Horn County Treasurer — PO Box 908, Hardin MT 59034
In Person
Visit the Treasurer's office — 121 W 3rd St, Room 204, Hardin MT 59034, Mon-Fri 8am - 5pm
Other Counties in Montana
About Big Horn County
Big Horn County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 13,124. The county seat is Hardin.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 2 weeks before your property taxes are due.
Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.