Randolph Barnes Marcy (April 9, 1812 – November 22, 1887) was a career officer in the United States Army, achieving the rank of Brigadier General before retiring in 1881. Although beginning in 1861 his responsibilities were those of a brigadier general, the U.S. Senate failed to confirm President Lincoln's September 28, 1861 appointment of Marcy as a brigadier general and it expired by law on March 4, 1863. The U.S. Senate finally confirmed Marcy's appointment as a brigadier general when he was also appointed inspector general of the U.S. Army on December 12, 1878. Marcy was awarded the honorary grade of brevet major general to rank from March 13, 1865 by nomination by President Johnson on December 3, 1867 and confirmation on February 14, 1868.