| Ephraim W. Harrington | |
| Birth Date: | 16 January 1833 |
| Birth Place: | Waterford, Vermont |
| Death Place: | Attleboro, Massachusetts |
| Placeofburial: | Grove Cemetery St. Johnsbury, Vermont |
| Allegiance: | United States |
| Branch: | United States Army |
| Rank: | Captain |
| Unit: | Company G, 2nd Vermont Infantry |
| Battles: | American Civil War Battle of Chancellorsville |
| Awards: | Medal of Honor |
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, Vermont 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.
Harrington died at the age of 81, on October 19, 1914, and was buried at Grove Cemetery in St. Johnsbury, Vermont.