U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Yankton agency


8:00 A.M. – 5:00 P.M. CST

Yankton Agency office

Adelita Guerue, Superintendent

Mailing Address: Bureau of Indian Affairs P.O. Box 577 Wagner, South Dakota 57380

Physical Address: Bureau of Indian Affairs 29775 S. Main St. Wagner, South Dakota 57380

Telephone: (605) 384-3651Telefax:       (605) 384-3876

Tribes Served: Yankton Sioux Tribe and Ponca Tribe of Nebraska

Yankton Sioux Tribe Robert Flying Hawk, Chairman P.O. Box 1153 800 Main Street, SW Wagner, South Dakota 57380

Telephone: (605) 384-3641Telefax:       (605) 384-5687

Trust Land Base: 36,741 acres

Estimated Tribal Enrollment: 11,594 members

Ponca Tribe of Nebraska Larry Wright Jr., Chairperson P.O. Box 288 2523 Woodbine Street Niobrara, Nebraska 68760

Telephone: (402) 857-3391Telefax:       (402) 857-3736

Trust Land Base: 819 acres

Estimated Tribal Enrollment: 2,783 members

The Yankton Sioux Tribe is located in the lower eastern part of Charles Mix County. The Tribe has approximately 11,594 members and approximately 4,600 member reside within the boundaries.

  • The Ponca Tribe has approximately 2,783 members
  • Recently the National Indian Gaming Commission said the Ponca Tribe could proceed with a Class II facility in the State of Iowa. The gaming site is in Carter Lake, Iowa and is 200 miles from the Ponca Tribe Headquarters in Niobrara, Nebraska. However, on January 23, 1990, when Congress passed the “Ponca Restoration Act”, lawmakers defined the Tribe’s service areas that included the State of Iowa. The two-part determination process, as defined by the Indian Gaming Regulatory Act, requires federal and state approval for off reservation casino. The NIGC said the two-part determination process does not apply in the Ponca case. As a restored Tribe, the Ponca Tribe’s quality for an exception in IRGA that makes it easier to open casinos away from existing reservations.  



Was this page helpful?

This Page Was Not Helpful Because The Content:


An official website of the U.S. Department of the Interior

Looking for U.S. government information and services?
Visit USA.gov