Samuel Storrow Sumner (1842-1937) was a United States general during the Spanish-American War, Boxer Rebellion, and Philippine-American War.

Sumner was born in Carlisle Barracks , Pennsylvania on February 16, 1842. He served in the Union army during the Civil War. For much of the war he served on the staff of his father, General Edwin V. Sumner. After the war's end he stayed in the army and served in the cavalry during the Indian Wars.

When the Spanish-American War broke out in May, 1898, Sumner was appointed brigadier general of volunteers and placed in command of the 1st Brigade, Cavalry Division, V Corps. He was sent to Cuba with the corps and led his brigade into action at the Battle of Las Guasimas. When Joseph Wheeler fell ill, Sumner temporarily assumed command of the Cavalry Division. He was still in command of the division when the fighting at the Battle of San Juan Hill began. However it's said that when Wheeler heard the sound of battle he rose from his sick bed and rushed to take command of the division. Sumner returned to command his brigade for the rest of the battle and in the Siege of Santiago. In September he was appointed major general of volunteers. After the war ended with Spain Sumner served as a military attaché to American Embassy in London. During the Boxer Rebellion, Summer was again in field command and led a brigade in the China Relief Expedition. He then was sent to the Philippines and commanded the 1st District, Department of Southern Luzon during the Philippine-American War. In 1902 he was appointed brigadier general in the regular army.

He continued to serve in the army until his retirement. He died on July 26, 1937 in Brookline, Massachusetts and is buried in Arlington National Cemetery.