Mick O'Brien

Mick O'Brien may refer to:


 * Mick O'Brien (boxer) (born 1954), Australian Olympic boxer
 * Mick O'Brien (footballer, born 1893), Irish international football player
 * Mick O'Brien (footballer, born 1979), English football player
 * Mick O'Brien (musician) (born 1961), Irish musician