James P. McMullan (October 13, 1936 – May 31, 2019) was an American actor from Long Island, New York, best known for his role as Dr. Terry McDaniel on the 1960s series Ben Casey and as Senator Andrew Dowling on the CBS primetime soap opera Dallas.

Born in Long Beach, Long Island, he went to Hollywood in 1961 to visit a friend and through a chance meeting with playwright William Inge, was given a screen test for Sam Peckinpah's Ride the High Country (1962) (Peckinpah also directed the screen test).

In 1962 McMullan appeared as Jess Kroeger on the TV western The Virginian on the episode titled "Impasse."

He guest-starred in over 150 TV shows including MacGyver, Doogie Howser, M.D., The Six Million Dollar Man, The Rockford Files, The Young and the Restless, The A-Team, and the made for-TV movie The Taking of Flight 847: The Uli Derickson Story (1988).

McMullan's many feature film credits include The Raiders (1963), where he played the part of Buffalo Bill Cody, Shenandoah (1965), The Happiest Millionaire (1967), Downhill Racer (1969), Pursuit (1972), Extreme Close-Up (1973), The Incredible Shrinking Woman (1981), Assassination (1987), Strategic Command (1997), Austin Powers: International Man of Mystery (1997) and Batman & Robin (1997).