Ross Leon Gaynor (born 9 September 1987) from Ardee, County Louth is an Irish professional footballer who played in the Football League for Millwall.
Gaynor then signed for Sporting Fingal in December 2008 for the season, but joined Drogheda United on loan in July 2009.
He was an important part of the defence that secured a first league title in 35 years for Rovers while also providing several assists.
He made a good start to the 2013 season again in the left-back position and scored his first league goal for the club in the home win over Derry City.
An injury towards the end of the year restricted his appearances but he added an FAI Cup winners' medal to his collection coming on as a sub in the 3–2 win against Drogheda in the final.