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 Treasurer
Tuesday, October 1, 2024

A reminder to all residents that the second half of property taxes is due by October 31st. There are several convenient ways to pay. You can pay in person, by mail, by our secure drop boxes or you can pay on-line. For more information please see the Treasurer's page under the Departments tab or call our office.
Yankton County
Tuesday, October 1, 2024

The Yankton County Government Center and all other non-emergency offices in the county will be closed on Monday, October 14th, 2024 in observance of Native American Day.
Yankton County Auditor
Friday, August 23, 2024

To read more about the General Election ballot questions, you can click here
Yankton County Highway Department
Tuesday, April 2, 2024

The Yankton County Highway Department will begin their summer hours on Monday, April 02, 2024 and will run until further notice.

Summer hours are Monday through Thursday 6:30am-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

Yankton County YouTube Channel

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