Association officials announced the total on Tuesday.
The Houston Golf Association has been funding youth-development programs since 1974. A total of $55.2 million has been donated to charities through the HGA -- about $51.46 million since Shell Oil became the tournament's title sponsor in 1992.
The money benefits about 200 charities in the Houston area. The HGA raised $2,145,000 in 2010.
The Houston Open is the 10th oldest event on the tour schedule. Last year, Shell announced a 5-year extension of its tournament title agreement that will run through 2017.