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