The Tower Society was established in 1997, the university's centennial year, to honor individuals who have cumulatively given $25,000 or more to SDSU. Members of the Tower Society have created a legacy of giving that will continue to advance the university's educational mission for generations. The Tower Society designation recognizes donors at four levels:

• Summa Cum Laude, for gifts totaling $1 million or more
• Magna Cum Laude, for gifts totaling $500,000 to $999,999
• Cum Laude, for gifts totaling $100,000 to $499,999
• Honors, for gifts totaling $25,000 to $99,999