Murray Seymour Klamkin (March 5, 1921 – August 6, 2004) was an American mathematician, known as prolific proposer and editor of professionally-challenging mathematical problems.

He received a bachelor's degree from the Cooper Union in 1942 and, after four years of service in the United States Army, earned a master's degree from the Polytechnic Institute of Brooklyn in 1947, where he taught from 1948 until 1957.

After this, Klamkin worked at AVCO, taught at SUNY Buffalo (1962–1964), and served as the principal research scientist at Ford Motor Company (1965–1976).

[3] Klamkin was known worldwide as a prolific proposer and editor of professionally challenging mathematical problems.

He served as problem editor for SIAM Review, the American Mathematical Monthly, Math Horizons, and other journals.