Peter MacKenzie is an American actor. His first major role was on the FOX show Herman's Head. He is a character actor.

His voice credits for American Dad include:

• A Smith In The Hand (18 September 2005) - Dr. Grossbard/Senator #1 (voice)
• Finances With Wolves (29 January 2006) - Chief Shopaholic/Midnight Runner #1/Salesman (voice)
• The Most Adequate Christmas Ever (16 December 2007) - Surgeon (voice)
• Chimdale (25 January 2009) - Actor (voice)
• Stan's Night Out (17 May 2009) - Fat Kid's Dad (voice)
• Shallow Vows (15 November 2009) - Actor (voice)