The 2012 Allan Cup was the 2012 Canadian Grand National Championship of Senior ice hockey and was the 104th year the trophy was awarded. It was contended in Lloydminster, Saskatchewan from April 16 to April 21, 2012 and hosted by the Lloydminster Border Kings of the Saskatchewan Hockey Association. The South East Prairie Thunder of Manitoba defeated the Rosetown Red Wings of Saskatchewan to win their first national championship. The Thunder were runners up in 2009.