Departments

Yankton County Extension Office

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

Extension Office

Hours of Operation:

Click here

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, March 13, 2026

The Yankton County Government Center and all other Yankton County non-emergency offices will be closed on Friday, April 3rd, 2026 and Monday, April 6th, 2026 to spend the Easter holiday with our loved ones.

Yankton County Treasurer

Sunday, March 1, 2026

Reminder: Yankton County residents that have last names starting with F, G and J have until March 31, 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