Kathryn George Frost (November 7, 1948 – August 18, 2006) was an American military officer who was the commander of the United States Army and Air Force Exchange Service from August 2002 to April 2005.

A major general, at the time of her retirement, she was the highest-ranking woman in the United States Army.

Frost's military career covered thirty-one years and included a four-year assignment as the Adjutant General of the United States Army, with concurrent assignment as the Commanding General, Physical Disability Agency, and Executive Director, Military Postal Service Agency, and as the Commander, Eastern Sector, United States Military Entrance Processing Command.

Shortly before assuming the post at AAFES, Frost was diagnosed with breast cancer.

She publicly stated that her military training gave her an advantage in dealing with cancer.