Departments

Yankton County Extension Office

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

Extension Office

Hours of Operation:

February 16th-20th

Phone:

(605) 665-3387

Fax:

(605) 665-2669

Address:

901 Whiting Drive
Yankton, SD 57078

Staff

Madison Melcher

Program Assistant II (4-H Educator) 605-665-3387 Send an Email

Announcements

Yankton County

Friday, February 13, 2026

The Yankton County Government Center and all other Yankton County non-emergency offices in the county will be closed on Monday, February 16, 2026 in observance of Presidents Day.

Yankton County Extension/4-H

Friday, February 13, 2026

Our office hours for the week of February 16th to February 20th can be found here

To visit with Madison and to learn more about the exciting things going on at the Yankton County 4-H, you can call, email or stop by 901 Whiting Drive Yankton, SD

Yankton County Treasurer

Sunday, February 1, 2026

Reminder:
Yankton County residents that have last names starting with C, D and E have until February 28, 2026 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