Ephraim W. Harrington (January 16, 1833 - October 19, 1914) was a Union Army soldier in the American Civil War who received the U.S. military's highest decoration, the Medal of Honor. Harrington was born in Waterford, Maine on January 16, 1833 and entered service at Kirby, Vermont. He was awarded the Medal of Honor, for extraordinary heroism shown on May 3, 1863 at the Battle of Chancellorsville, while serving as a Sergeant with Company G, 2nd Vermont Infantry. His Medal of Honor was issued on December 13, 1893.