It was part of the Gaon Music Chart, which launched in February 2010.
Girls' Generation, Big Bang, and JYJ topped the chart with three different albums each, more than any other act.
CNBLUE, Kim Hyun-joong, and Super Junior each had two number one albums on the chart.
On the monthly chart, TVXQ and Big Bang had the most album number-ones, with two each.
Overall, Girls' Generation's The Boys was Gaon's best-selling album of 2011, selling 385,348 copies.