The 2010–11 Ulster Rugby season was Ulster's 17th season since the advent of professionalism in rugby union, and their second under head coach Brian McLaughlin. This season marked the debuts of two South Africans, scrum-half Ruan Pienaar (replacing Isaac Boss, who had moved to Leinster) and second row forward Johann Muller. Ulster were quarter-finalists in the European Rugby Champions Cup, and semi-finalists in the Celtic League. Ruan Pienaar was Player of the Year. Nevin Spence was IRUPA Young Player of the Year. Forwards coach Jeremy Davidson left at the end of the season.