Robert Golden Armstrong (meist kurz R. G. Armstrong; * 7. April 1917 in Birmingham, Alabama; † 27. Juli 2012 in Studio City, Los Angeles) war ein US-amerikanischer Fernseh-, Film- und Theaterschauspieler. ()
Robert Golden Armstrong was an American actor and playwright. A veteran character actor who appeared in dozens of Westerns over the course of his 40-year career, he may be best remembered for his work with director Sam Peckinpah.