Oswald George Nelson (March 20, 1906 – June 3, 1975) was an American actor, filmmaker, musician, and bandleader. He originated and starred in The Adventures of Ozzie and Harriet, a radio and television series with his wife Harriet and two sons David and Ricky Nelson.

In the 1940s, Nelson began to look for a way to spend more time with his family, especially his growing sons. Besides band appearances, Harriet and he had been regulars on The Raleigh Cigarette Program, Red Skelton's radio show. Nelson developed and produced his own radio series, The Adventures of Ozzie and Harriet. The show originally aired in 1944, with their sons played by actors until 1949. In 1952, it moved to television, where David and Ricky appeared on camera. The radio version continued for another two years, and the last television episode aired in 1966.