Cattlesoft, Inc.
- Produces LonghornMax, a software program designed specifically for the Texas Longhorn breed. Manages information including health, pedigree, marketing, and horn measurements.
- http://www.longhornmax.com/

Texas Longhorn Breeders of New Mexico
- Membership, Sales, Shows, Calendar promoting Texas Longhorn Cattle in New Mexico
- http://www.tlbnm.com

Longhorn Salepen
- This site serves as a central site for Texas Longhorn breeders to market their quality Longhorn cattle. It offers bulletin boards to showcase the animals and includes descriptions of the breeder's programs.
- http://www.longhornsalepen.com

Midwestern Longhorn Association
- Dedicated to the promotion and preservation of the Texas Longhorn and to education on the positive attributes of the breed. Includes events and membership information.
- http://www.nehorse.com/mlahome.html

The Longhorn Network
- Provides Texas Longhorn enthusiasts with Ranch sites, longhorn shows, events related to longhorns and breeder listings.
- http://www.longhornnetwork.com/

International Texas Longhorn Association
- Organization dedicated to the development, registration, and promotion of the Texas Longhorn breed of cattle. Information on breed standards, branding tips and membership.
- http://www.itla.com/

Texas Longhorn Breeders Association of America
- Our primary purpose is to register Texas Longhorn cattle.
- http://tlbaa.org/

Longhorn Roundup
- Marketing Texas Longhorn cattle through private treaty and consignment sales.
- http://www.longhornroundup.com

California Association of Texas Longhorn Breeders
- Site includes, members, newsletter, history of Texas Longhorn Cattle in California.
- http://catl.com/