2026 Property Tax Due Dates
Installment 1
January 31
Full or first installment
Installment 2
July 31
Second installment
Penalty: 1% monthly + 0.5% penalty monthlyGrace period: 5 business days
Payment Methods
Online, Mail, In-Person
Marathon County Treasurer
Phone
(715) 261-1150How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Marathon County Treasurer
In Person
Visit the Treasurer's office
Other Counties in Wisconsin
About Marathon County
Marathon County is a county located in the U.S. state of Wisconsin. As of the 2020 census, the population was 138,013. Its county seat is Wausau.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 14 days 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.