Samuel Miller Quincy (/ˈkwɪnzi/; 1832–1887) was the 28th mayor of New Orleans and a Union Army officer during the American Civil War.

He was also a Harvard graduate (1852), lawyer and legal historian, and Union soldier in the American Civil War, during which he was wounded, captured, imprisoned, and exchanged.

Shortly after the attack on Fort Sumter, Quincy was commissioned a captain in the 2nd Massachusetts Infantry Regiment on May 25, 1861.

[3] On February 21, 1866,[4] President Andrew Johnson nominated Quincy for the award of the honorary grade of brevet brigadier general, United States Volunteers, to rank from March 13, 1865, for gallant and meritorious services during the war,[5] The U.S. Senate confirmed the award on May 18, 1866.

[4] He was a member of the Massachusetts Commandery of the Military Order of the Loyal Legion of the United States.