Michael Costello

Michael Costello may refer to:
 * Michael Costello (public servant), ex-chief of staff to Australian politician Kim Beazley
 * Michael A. Costello (born 1965), State Representative for the Massachusetts House of Representatives
 * Michael Costello (fashion designer) (born 1983), American fashion designer and contestant on Project Runway
 * Michael Copps Costello (1875–1936), Canadian politician
 * Mike Costello, British sports broadcaster
 * Michael Joe Costello (1904–1986), Irish Army general
 * Mick Costello (born 1936), British communist activist