The National Dog Show is a conformation show sanctioned by the American Kennel Club. The National Dog Show has been ongoing since 2002. The show is held by The Kennel Club of Philadelphia a founding club of AKC, the Kennel Club of Philadelphia. It traditionally takes place on the third from last weekend in November over two days. The NDS's motto: Dog before master.

The National Dog Show is one of the three major dog shows in the United States, along with the AKC/Eukanuba National Championship and the Westminster Dog Show. Winners may be invited to compete at Crufts. As with all AKC conformation shows, mixed-breed dogs are not eligible to participate.