Hancock, Winfield Scott (1824–1886), a United States army officer. Hancock fought in most of the major battles of the Union Army of the Potomac during the Civil War. He became commander of the II Army Corps in 1863. Hancock was seriously wounded in the Battle of Gettysburg when his corps repulsed Pickett's charge, but returned to action in early 1864. General U. S. Grant called him "the most conspicuous figure of all the general officers who did not exercise a separate command."

Hancock was born in Montgomery County, Pennsylvania. He graduated from West Point in 1844 and served creditably in the Seminole War, in Florida; the Mexican War; and the Kansas border struggles. After the Civil War Hancock received the thanks of Congress for his conspicuous service in the Battle of Gettysburg, and was made a major general in the regular army (1866). In 1880 Hancock was the Democratic candidate for President. Although he received nearly half the popular vote, Hancock won only 155 electoral votes to James A. Garfield's 214.