Catherine Harr, president of the shelter's board, said the cat now belongs to a couple with a teenage child. She said they are building a castle to go over Prince Chunk's litter box.
The adoption comes after a vet gave the cat a clean bill of health - other than his large weight.
Harr said the couple was chosen because they have past experience with cats, and their finances are stable - unlike the cat's former owner.
The cat garnered national media attention because of his weight. That included an appearance on the "Live with Regis & Kelly" talk show.
There was so much media attention that shelter officials last Sunday had to sneak the cat out of a foster home and move him to another foster family, Harr said.
Thousands of people, from as far away as London and California, called to inquire about adopting the cat, Harr said. Unfortunately, she said no one who contacted the shelter was interested in adopting any of the more than 200 other cats and kittens presently in the shelter's care.
The shelter had to euthanize about 1,000 unwanted cats last year, about a third of the cats it took in, she said.
