Gouverneur Kemble Warren (January 8, 1830 – August 8, 1882) was a civil engineer and prominent general in the Union Army during the American Civil War. He is best remembered for arranging the last-minute defense of Little Round Top during the Battle of Gettysburg and is often referred to as the "Hero of Little Round Top." His subsequent service as a corps commander and his remaining military career were ruined during the Battle of Five Forks, when he was relieved of command by Philip Sheridan.

At the start of the Gettysburg Campaign, as Confederate General Robert E. Lee began his invasion of Pennsylvania, Warren advised Hooker on the routes the Army should take in pursuit. On the second day of the Battle of Gettysburg, July 2, 1863, Warren initiated the defense of Little Round Top, recognizing the importance of the undefended position on the left flank of the Union Army, and directing, on his own initiative, the brigade of Colonel Strong Vincent to occupy it just minutes before it was attacked. Warren suffered a minor neck wound during the Confederate assault.

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