Joseph Olds Gregg (January 5, 1841 - February 25, 1930) was a Union Army soldier in the American Civil War who received the U.S. military's highest decoration, the Medal of Honor.Gregg was born in Lithopolis, Ohio on January 5, 1841. He was awarded the Medal of Honor, for extraordinary heroism shown on June 16, 1864, while serving as a Private with Company F, 133rd Ohio Infantry, near the Richmond and Petersburg Ry., Virginia .