Donald Whittle (born 16 November 1960) is a former Ireland rugby union international from Northern Ireland.
Born in Newtownards, County Down, Whittle attended Bangor Grammar School and played for Bangor RFC, as a back-row forward. He was a PE teacher by profession and made his provincial debut for Ulster in 1987.
Capped once for Ireland, Whittle was called up for the 1988 Five Nations Championship and played the match against France at the Parc des Princes, with selectors looking to add some more physical strength to their pack.
Whittle joined London Irish in the 1988/89 season.