Theresa Wallach (30 April 1909 – 30 April 1999) was an adventure motorcyclist, engineer, mechanic and author.
In 1935 with another experienced motorcyclist named Florence Blenkiron, she rode a 600 cc single-cylinder Panther motorcycle complete with sidecar and trailer, from London to Cape Town, South Africa, crossing the Sahara desert, reportedly without a compass.
Wallach was the first Vice President of the Women's International Motorcycle Association, and was inaugurated into the AMA Motorcycle Hall of Fame in 2003.