Stump came out of retirement last week to compete.
His handler and other co-owner, Scott Sommer of Texas, competed with six other dogs for the title.
Stump won Best in Show last night at the Westminster Kennel Club dog show in New York.
At the age of 10, that's about 70 in human years. He's the oldest Best in Show winner.
With floppy ears and a plodding gait, the golden-red Stump was an instant fan favorite at the Garden.
A nearly full crowd cheered loudly when Stump was chosen from a field of seven that included a giant schnauzer that was the nation's top show dog, a favored Brussels griffon, a Scottish deerhound named Tiger Woods, a standard poodle with 94 best in show wins, a Scottish terrier and a puli.