David Seymour (born Dawid Szymin; November 20, 1911 – November 10, 1956), or Chim (pronounced shim, an abbreviation of the surname "Szymin"), was a Polish photographer and photojournalist known for his images from the Spanish Civil War, for co-founding Magnum Photos with Henri Cartier-Bresson, Robert Capa, George Rodger and William Vandivert, and for his project "Children of War" with UNICEF that captured the plight of children in the aftermath of World War II. He became president of Magnum after Capa's death in 1954 and held this post until his own death in 1956 by Egyptian machine-gun fire in the aftermath of the Suez crisis.
He was a reporter on the BBC's regional news television series Look North from its outset in March 1968. He left in 1973 to join the presentation team for the lunchtime show 'Pebble Mill At One' until 1978.