Michael Costello

• Michael Costello, ex-chief of staff to Australian politician Kim Beazley
• Michael A. Costello, State Representative for the Massachusetts House of Representatives
• Michael Costello , American fashion designer and contestant on Project Runway
• Michael Costello , American racing driver
• Michael Copps Costello, Canadian politician
• Mike Costello, British sports broadcaster
• Michael Joe Costello, Irish Army general
• Mick Costello, British communist activist