Departments

Yankton County Extension Office

The Extension Office is located next to the 4-H fairgrounds on Whiting Drive.

Extension Office

Hours of Operation:

Monday through Friday
9:00am to 5:00pm

Phone:

(605) 665-3387

Fax:

(605) 665-2669

Address:

901 Whiting Drive
Yankton, SD 57078

Staff

Announcements

Yankton County

Wednesday, November 12, 2025

The Yankton County Government Center and all other Yankton County Non-Emergency offices will be closed on Thursday, November 27, 2025 and Friday, November 28, 2025 to enjoy Thanksgiving and to spend time with our families.

Happy Thanksgiving!

Yankton County Treasurer

Saturday, November 1, 2025

Reminder: Yankton County residents that have last name starting with T, U, V, W, X Y and Z, have until November 30, 2025 to renew vehicle registration.

Main Phone:
(605) 260-4400

Address:
321 West 3rd Street, Suite 100 Yankton, SD 57078

Office Hours:
9:00am - 5:00pm CST, Monday-Friday
Closed on Holidays, Saturdays, & Sundays