Ray O'Brien (born 21 May 1951) is an Irish former professional football player.
O'Brien was born in Dublin.
O'brien began his career with Shelbourne before transferring to Manchester United.
At Meadow Lane he created a club record in 1979–80 when he became the first full back to finish as leading scorer. He spent ten years at County making over 300 Football League appearances.
He also won four caps for the Republic of Ireland national football team, making his debut on 24 March 1976 in a 3–0 home win over Norway in a friendly game.
His brother Fran O'Brien also played for his country.
- Tim Evershed (1 August 2015). Notts County On This Day: History, Facts & Figures from Every Day of the Year. Pitch Publishing. pp. 43–. ISBN 978-1-78531-093-5.
- Arnold Town FC: A club history Arnold Town F.C.
- The Complete Who's Who of Irish International Football, 1945-96 (1996):Stephen McGarrigle
- Gifted in Green, Adam Ward, 1999. PB ISBN 0-600-59739-3 p. 23