Buffalo County Government

Gann Valley is the county seat of Buffalo County, as well as the center of population of South Dakota. Buffalo County Population: 1,962 (2019 census estimate)

The Buffalo County Courthouse is the headquarters of local government for the public. Auditor, Treasurer, Register of Deeds, Director of Equalization, and Sheriff offices are located in this building. Monthly meetings and other public events are conducted in the courtroom on the first Tuesday each month. For more information, please view their website: Buffalo County, SD.

Auditor & Register of Deeds

Contact: Debra Morrison
Address: 112 Osman Ave., PO Box 146, Gann Valley, SD 57341
Phone: (605) 293-3217 | Fax: (605) 293-3240
Email: buffalo.aud@midstatesd.net
Courthouse Hours: Monday – Friday | 9:00am – 5:00pm

Clerk of Courts

Address: 300 S. Courtland St., Ste. 111, Chamberlain, SD 57325
Phone: (605) 734-4580 | Fax: (605) 734-4582
Courthouse Hours: Monday – Friday | 9:00am – 5:00pm

Commissioners

Director of Equalization, 911 Coordinator, RAVE

Contact: Lee Sinkie
Address: 112 Osman Ave., PO Box 175, Gann Valley, SD 57341
Phone: (605) 293-3286 | Fax: (605) 293-3240
Email: buffalo.rod@midstatesd.net
Courthouse Hours: Monday – Friday | 9:00am – 5:00pm

Emergency Manager

Contact: Arlen Gortmaker
Phone: (605) 853-2769
Email: hcem@handcounty.org

Highway Department

Contact: Wes Wulff
Address: PO Box 136, Gann Valley, SD 57341
Phone: (605) 293-3263 | Fax: (605) 293-3240
Email: buffcohighway@midstatesd.net
Highway Hours: Monday – Thursday | 7:00am – 5:00pm

Sheriff

Contact: Wayne Willman
Address: 112 Osman Ave., PO Box 115, Gann Valley, SD 57341
Phone: (605) 293-3231 | Fax: (605) 293-3240
Email: buffalocoso@midstatesd.net

State's Attorney

Contact: David Larson – Steve Fox
Address: PO Box 131, Chamberlain, SD 57325
Phone: (605) 234-2222
Email: dlarson@larsonlawpc.com

Treasurer

Contact: Janice VonEye
Address: 112 Osman Ave., PO Box 165, Gann Valley, SD 57341
Phone: (605) 293-3236 | Fax: (605) 293-3240
Email: buffalo.aud@midstatesd.net
Courthouse Hours: Monday – Friday | 9:00am – 5:00pm

Veterans Service Officer

Contact: Tim Thomas
Phone: (605) 234-4433
Email: ttbsvso@midstatesd.net

Weed & Pest Supervisor

Contact: Lee Sinkie
Address: 112 Osman Ave., PO Box 146, Gann Valley, SD 57341
Phone: (605) 293-3286 | Fax: (605) 293-3240
Email: buffalo.rod@midstatesd.net
Courthouse Hours: Monday – Friday | 9:00am – 5:00pm