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

Katie Doty

4-H Youth Development Coordinator Send an Email

Announcements

Yankton County Treasurer

Tuesday, July 1, 2025

Reminder: Yankton County residents that have last names starting with M and N have until July 31, 2025 to renew vehicle registration.

Yankton County

Friday, June 20, 2025

The Yankton County Government Center and all other non-emergency offices in the county will be closed on Friday, July 4th, 2025 in honor of Independence Day.

Yankton County Highway Department

Tuesday, April 1, 2025

The Yankton County Highway Department will begin their summer hours on Monday, April 07, 2025 and will run until further notice.

Summer hours are Monday through Thursday 6:30am to 5:00pm.

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