When are property taxes due in Buffalo County, South Dakota?

Buffalo County property taxes are due April 30. A second installment is due October 31. This deadline applies to all counties in South Dakota.

What is the penalty for late property tax payment in Buffalo County, South Dakota?

The late payment penalty in Buffalo County is 10% annual (0.833% monthly).

How do I pay Buffalo County, South Dakota property taxes?

You can pay Buffalo County property taxes by mail to the county treasurer.

← Back to South Dakota

Buffalo County Property Tax Due Date

South Dakota

(605) 293-3236

2026 Property Tax Due Dates

Installment 1

April 30

First half

Installment 2

October 31

Second half

Penalty: 10% annual (0.833% monthly)Grace period: None

Payment Methods

Online, Mail, In-Person

Buffalo County Treasurer

Phone

(605) 293-3236

Office Address

112 Osman Ave.
Gann Valley, SD 57341

Get Directions

Mailing Address

PO Box 165

How to Pay

Online

Pay using credit card or e-check

By Mail

Mail check payable to Buffalo County Treasurer — PO Box 165

In Person

Visit the Treasurer's office — 112 Osman Ave., Gann Valley SD 57341

Other Counties in South Dakota

Aurora Beadle Bennett Bon Homme Brookings Brown Brule Butte

View all South Dakota counties →

About Buffalo County

Buffalo County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 1,948. Its county seat is Gann Valley which, at 10 people, is the least populous county seat in the United States.

Source: Wikipedia — content available under CC BY-SA 4.0

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for Buffalo

View office directory

Property Tax FAQ Tax Calendar

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.