Edmund Siegfried Valtman was an Estonian and American editorial cartoonist and winner of the 1962 Pulitzer Prize for Editorial Cartooning.

Born in Tallinn, Estonia, he sold his first cartoons at age 15 to the children's magazine Laste Rõõm. He worked as an editorial cartoonist for the newspapers Eesti Sõna and Maa Sõna under the name Vallot and studied at the Tallinn Art and Applied Art School. When the USSR reoccupied Estonia in 1944, he and his wife fled the country with the retreating Nazi troops and then spent the next four years in a displaced persons camp in Germany, which was still under the control of Allied occupation forces. They emigrated to the United States in 1949, first to New Jersey and then to Hartford, Connecticut.

Once in the US, Valtman worked for The Hartford Times from 1951 until his 1975 retirement. He was noted for his caricatures of Cold War–era communist leaders like Nikita Khrushchev and Leonid Brezhnev. He won the Pulitzer Prize for his August 31, 1961 cartoon. It showed Fidel Castro leading a shackled, beaten-down man representing Cuba and advising Brazil "What You Need, Man, Is a Revolution Like Mine!"

Valtman died in a Bloomfield, Connecticut retirement home.