David Cassidy net worth: David Cassidy is an American actor, singer and musician who has a net worth of $5 million. David Cassidy is probably most famous for being a 1970s teen heart throb most notably from the television show The Partridge Family. David Cassidy also had a successful music career. Throughout the 70s and 80s Cassidy was a popular touring solo artist who performed concerts around the world. He has also acted in dozens of films and televisions shows. David Cassidy was born in New York City, New York.