- AKC - Sealyham Terrier - Breed standard according to the American Kennel Club.
- Century Sealyhams - Memory lane of Sealyham terriers. The history behind the sealyham terrier, including hunting, famous dogs and early sealyham shows. New updates every month with presentations of famous kennels.
- Sealyham Terrier Book - Foyles handbook for Sealyham lovers, written by Mrs. Freda Chenuz, breed information and history.
- Sealyham Terrier Site - All details from the United Kingdom dog shows for the breed.
- The Thompson's Terriers - Featuring Bonnie (Scottish Terrier) & Topper (Sealyham Terrier). Photos, Mpeg movies, links and chat.
Rescues And Shelters
- American Sealyham Terrier Club - The AKC affiliate breed club. Breed history, rescue information, contacts and calendar of events.
- Scandinavian Sealyham Terrier Club - Club information, breed history, photo gallery, pedigree help, aid in finding a Sealyham Terrier and message board.
- Sealyham Terrier Club of Southern California, Inc. - Sealyham introduction, appearance and personality of the breed. Also FAQs, breed standard, buying advice and information about the club.
- Abricot Kennels - Features breed history, show news, litter announcements, and links.
- Chalan - Small kennel in Auckland, New Zealand with occasional puppies available. Breed information and photographs.
- Fanfare - Photographs of their dogs, a message from the breeder and links. San Jose, California, United States.
- Llawhaden - Information about their dogs and their ancestors, including pedigrees with photographs. Sweden.
- Princess Kindliness - Includes history of the breed in the Netherlands and links.
- Saskatoon - News, kennel history, photograph gallery, pictures, and pedigrees. Poland.
- Trailview - Information about breed, grooming tips, breed history, breed description, frequently asked questions, photographs, and links. Dayton, Ohio.
- Vom Ammelbruch - Hobby breeders located in Langfurth, Germany. Kennel information, photographs, news, and links.