2026 Property Tax Due Dates
Installment 1
December 20
First half or full payment
Installment 2
May 10
Second half
Penalty: Interest charged monthlyGrace period: None
Payment Methods
Online, Mail, In-Person
Osage County Treasurer
Phone
(785) 828-4923How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Osage County Treasurer
In Person
Visit the Treasurer's office
Other Counties in Kansas
About Osage County
Osage County ( oh-SAYJ) is a county located in the U.S. state of Kansas. Its county seat is Lyndon, and its most populous city is Osage City. As of the 2020 census, the county population was 15,766.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 336 hours 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.