Steven, Stephen, or Steve O'Brien may refer to: Steven O'Brien (pilot), Minnesota Air National Guard pilot who witnessed the 9/11 attack flights Steven O'Brien (dual player) (born 1994), Tipperary Gaelic football and hurling player Steven O'Brien (Cork Gaelic footballer) (born 1969), Irish Gaelic footballer Stephen O'Brien (born 1957), British politician and diplomat Stephen J. O'Brien (born 1944), American geneticist Stephen O'Brien (musician), member of HAL, an Irish band Stephen O'Brien (Kerry Gaelic footballer) (born 1991), Irish sportsperson