List of Famous people who are 91

Martin Bauml Duberman is an American historian, biographer, playwright, and gay rights activist. Duberman is Professor of History Emeritus at Herbert Lehman College in the Bronx, New York City.

Ernst Schmutzer is a German theoretical physicist.

John Michael Landy is an Australian retired middle-distance runner and state governor. He was the second man to break the four-minute mile barrier in the mile run and held the world records for the 1500-metre run and the mile race. He was also the 26th Governor of Victoria from 2001 to 2006.

Stefan Polónyi was a Hungarian-born German civil engineer.

Matthew Stanley Meselson is a geneticist and molecular biologist currently at Harvard University, known for his demonstration, with Franklin Stahl, of semi-conservative DNA replication. After completing his Ph.D under Linus Pauling at the California Institute of Technology, Meselson became a Professor at Harvard University in 1960, where he has remained, today, as Thomas Dudley Cabot Professor of the Natural Sciences.