Riley has also received the international prize for painting at the 1968 Venice Biennale, the Kaiserring of the city of Goslar in 2009 and the 12th Rubens Prize of Siegen in 2012.
Riley har också fått internationellt pris för måleri vid Venedigbiennalen 1968, Kaiserring of the City of Goslar 2009 och 12:e Rubenspriset i Siegen 2012.