Alex McArthur (born March 6, 1957) is an American actor.

Early life and education
He was born in Telford, Pennsylvania, the son of Bruce, a contractor, and Dolores McArthur. He studied acting at De Anza College and San Jose State University, and worked as a bartender at the legendary nightclub Studio 54 in New York.

Career
McArthur became known for portraying Charlie Reece in the film Rampage, and Duell McCall in the western TV film series Desperado, whose original screenplay was written by Elmore Leonard. He was nominated for Gemini Awards for Best Performance by an Actor in a Supporting Role, for the television film Woman on the Run: The Lawrencia Bembenek Story.

He also appeared in the music video for Madonna's song "Papa Don't Preach", which was included in her The Immaculate Collection video compilation. In the video he appears as Madonna's boyfriend and the father of her unborn child.

Personal life
On December 21, 2019, McArthur's son Jacob was shot and killed in Oroville, California. A suspect was arrested on July 12, 2021.