Barbara Leonard Reynolds (born Barbara Dorrit Leonard; Milwaukee, Wisconsin, June 12, 1915 – February 11, 1990), was an American author who became a Quaker, peace activist and educator.
In 1951, Reynolds moved with her husband to Hiroshima where he conducted a three-year study on the effects of radiation on children who had survived the first atomic bomb. She and her family then became peace activists, sailing around the world to protest nuclear weapons. In the early 1960s, she traveled around the world with atomic bomb survivors to show world leaders, first-hand, the horrors of nuclear warfare. She then established the World Friendship Center, devoting 13 years to it, and donated the Hiroshima Nagasaki Memorial collection.
After this, she continued her peace and anti-nuclear activism, and after 1978, in California, she helped to resettle Cambodians fleeing Pol Pot, among other humanitarian pursuits.