McIlroy, 23, won the 2012 PGA Championship by a record eight strokes, while he also won four other titles including the Race to Dubai to finish top of the PGA and European Tour money lists.
The Northern Irishman also won the PGA Player of the Year, PGA Tour Player of the Year, Vardon Trophy, and Byron Nelson Award and this week was voted the European Tour Golfer of the Year.
“Everyone who knows me knows how special the 2012 season was,” McIlroy said in a statement. “Now, to have been named as the European Tour Golfer of the Year puts the icing on the cake.
“It is a very special honor, indeed, and you only need to look down the list of players who have preceded me as the winner of this award to see precisely why – quite simply, it is a who’s who of golf and I’m delighted to now be a part of that in the history books.”