Samuel Nicoll Benjamin (January 3, 1839 – May 15, 1886) was a Union Army officer during the American Civil War who received the Medal of Honor.

Benjamin graduated from the United States Military Academy at West Point with the class of 1861.

Following the Civil War, he served at West Point and in the Adjutant General Corps.

He received his Medal of Honor on June 11, 1877, for his service from Bull Run to Spotsylvania, Va. over the period from July 1861 to May 1864.

Senator, and U.S. Secretary of State Hamilton Fish (1808–1893) and Julia Ursin Niemcewiez Kean (1816–1887).