Thompson Quarter Horses
- Standing palomino, sorrel, and gray stallions at stud. Includes sales list, photos, and profiles of horses. Located in Yankton.
- http://www.thompsonquarterhorses.com/

Triple C Performance Horses
- Standing blue roan stallion at stud. Includes sales list, photos, and profiles of horses. Located in Colman.
- http://www.trcperformancehorses.com

Knippling Ranch Quarter Horses
- Standing bay and dun stallions at stud. Includes sales list, photos, and profiles of horses. Offers production sale each September. Located in Gann Valley.
- http://www.quarterhorsecentral.net

Benz Ranch Quarter Horses
- Standing sorrel and grullo stallions at stud. Includes sales list, photos, and profiles. Located in Steele.
- http://www.benzranch.com

Newland Ranch
- Belle Fourche facility standing Kings Mr Gold and Lucky Joe Lynx. Features stallion photos and pedigrees, broodmare profiles, show results, and a sales list.
- http://www.newlandranchquarterhorses.com/

Schimke Ranch Performance Horses
- Stands Frostman San Peppy, Oh Magnolia, and Frsted Pepper. Stallion photos, broodmare profiles, and a sales list. Located in Wessington Springs.
- http://www.schimkeranch.com/

Cowan Brothers LLC
- Large stud farm standing several sires including Sun Frost, Docs Oaks Sugar, and PC Dox Cajun. Stallion details and a sales catalog. Located in Highmore.
- http://www.cowanbrothers.com/

Krogman Quarter Horses
- Breeding foundation bred Quarter Horses for color, performance, and cow sense. Ranch history, pedigrees, photographs, and sales. Located at White River.
- http://www.kquarterhorse.com/

Chord Family Ranch
- Offers ranch raised horses for sale. Site also includes information on the ranch, owners, and hunting. Located in Edgemont.
- http://www.ceeheart.com/

Quickstad Quarter Horses
- Foundation breeding for speed and conformation since 1974. History, photographs, and pedigrees. Located in Whitewood.
- http://quickstadquarterhorses.com/

Frenchmans Quarterhorses
- Specializing in barrel racing lines. Offers information on stallions, broodmares, foals, and horses for sale. Located in Hot Springs.
- http://frenchmansquarterhorses.com/

Derr Quarter Horses
- Standing Princely Best. Site offers breeding information. Located in Caputa.
- http://www.derranch.com/