Casey Siemaszko (gebore 17 Maart 1961) is 'n Amerikaanse akteur. Hy is bekend vir sy rolle in die rolprente Back to the Future (1985), Stand by Me (1986), Young Guns (1988), en The Phantom (1996).
- 1985: Back to the Future
- 1986: Stand by Me
- 1987: Three O'Clock High
- 1988: Young Guns
- 1989: Breaking In
- 1991: The Big Slice
- 1992: Near Mrs.
- 1992: Of Mice and Men
- 1993: The Paint Job
- 1994: Teresa's Tattoo
- 1996: The Phantom
- 1997: Bliss
- 1994: 704 Hauser
- 1995: New York Daze
- 1991: The Chase
- 1998: The Polish Americans
- 1999: Chameleon II: Death Match
- 2013: Killing Kennedy
