Ben McKenzie

McKenzie was born in Austin, Texas. He is one of three sons born to Frances Schenkkan, a poet, and Pete Schenkkan, an attorney. He has two younger brothers, both of whom are former actors. He is the brother-in-law of photojournalist Scout Tufankjian.

His grandfather, Robert F. Schenkkan, was a professor at the University of Texas at Austin and worked on passing the Public Broadcasting Act of 1967. He is a nephew of Pulitzer Prize-winning playwright Robert Schenkkan; McKenzie appeared in his 2019 work The Investigation. His middle name, McKenzie, is his paternal grandmother's maiden name; he uses it as part of his stage name to avoid confusion with actor Ben Shenkman. His second cousin is actress Sarah Drew.

For middle school, he attended St. Andrew's Episcopal School, where he was friends and flag football teammates with future Super Bowl MVP Drew Brees. He attended Stephen F. Austin High School, playing wide receiver and defensive back for the school's football team. From 1997 to 2001 he attended the University of Virginia, his father and paternal grandfather's alma mater, where he majored in foreign affairs and economics.