2026 Property Tax Due Dates
May 10
Spring installment
November 10
Fall installment
Payment Methods
Online, Mail, In-Person
Sullivan County Treasurer
Phone
(812) 268-6410How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Sullivan County Treasurer
In Person
Visit the Treasurer's office
Other Counties in Indiana
About Sullivan County
Sullivan County is a county in the U.S. state of Indiana, and determined by the US Census Bureau to include the mean center of U.S. population in 1940. As of 2023, the population was estimated at 20,757. The county seat (and the county's only incorporated city) is Sullivan.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
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We'll email you a fortnight 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.