Donald John DeFore (August 25, 1913 – December 22, 1993) was an American film, radio, and television actor. DeFore is best known as Erskin "Thorny" Thornberry, the Nelson family's neighbor on the long running sitcom The Adventures of Ozzie and Harriet and as George "Mr. B." Baxter on the 1960s sitcom Hazel.
On December 22, 1993, DeFore died of cardiac arrest at Saint John's Health Center in Santa Monica, California. He is interred at the Westwood Village Memorial Park Cemetery in Los Angeles.
For his contribution to the television industry, Don DeFore has a star on the Hollywood Walk of Fame located at 6804 Hollywood Blvd.