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 Highway Department

Tuesday, December 2, 2025

The Yankton County Highway Department will begin their winter hours on Monday, December 01, 2025 and will run until further notice.

At this time the winter hours are:
Monday through Thursday: 6:30am to 5:00pm.

Yankton County

Monday, December 1, 2025

The Yankton County Government Center and all other Yankton County Non-Emergency offices will be closed on Wednesday, December 24th, Thursday, December 25th and Friday, December 26th 2025 to spend the holidays with our loved ones.

Happy Holidays to all!

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