Towns & Cities

The Place We Call Home

Yankton County, established in 1862, is located along the southern border of South Dakota along the Missouri River. The county encompasses a total area of 533 square miles with a population of 23,310 (2020 US Census estimate).

The primary industries in the county are agriculture, manufacturing, and services.

The county seat is located in the largest city in the county - Yankton (population 15,411).

Our Cities and Towns

Announcements

Yankton County
Thursday, May 14, 2026

The Yankton County Economic Development Task Force will meet Thursday, May 21 at 11:30 AM and the Financial Task Force will meet Tuesday, May 26 at 4:00 PM.

These meetings will be held at the Emergency Management Offices at 807 Capital St.
Yankton County
Monday, May 11, 2026

The Yankton County Government Center and all other Yankton County non-emergency offices will be closed on Monday, May 25th, 2026 in honor of Memorial Day. Thank you to the brave men and women who have made the ultimate sacrifice.
Yankton County Treasurer
Friday, May 1, 2026

Reminder: Yankton County residents that have last names starting with H, I and O have until May 31, 2026 to renew vehicle registration.
Yankton County Weed Department
Wednesday, April 29, 2026

The Yankton County Weed Department would like to remind residents, that SD Law requires that all landowners control noxious weeds on their property.

To read more information, you can click here

Yankton County Highway Department
Wednesday, April 1, 2026

The Yankton County Weed Department would like to remind that Yankton County landowners are required to control noxious weeds on their property. The Weed Department will begin their inspections on May 1, 2026.

To learn more information, please click here

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

Yankton County YouTube Channel

Yankton County © 2026. Developed by Intuvio Solutions.