Departments

Yankton County Extension Office

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

Extension Office

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

(605) 665-3387

(605) 665-2669

901 Whiting Drive
Yankton, SD 57078

4-H Youth Development Coordinator Send an Email

Yankton County Treasurer

Monday, September 1, 2025

Reminder: Yankton County residents that have last name starting with S, have until September 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