O
- Carroll O'Connor (1924–2001), actor
- Hugh O'Connor (1962–1995), actor, son of Carroll O'Connor
- Heather O'Rourke (1975–1988), actress
- Barbara Orbison (1950–2011), wife of Roy Orbison
- Roy Orbison (1936–1988), singer; grave unmarked
Read more about this topic: Westwood Village Memorial Park Cemetery