Captain Silas G. Elliott, promoted first sergeant December 12, 1863; first lieutenant June 12, 1864; captain, January 21, 1865; transferred from A to E; mustered out with company.

First Lieutenant Theron S. Winship, transferred to regimental staff as adjutant, April 13, 1862.

First Lieutenant Addison J. Andrews, promoted first sergeant December 22, 1863; first lieutenant, January 21, 1865; mustered out with company.

First Lieutenant William Neil, 1862, promoted to first lieutenant April 13, 1862; resigned January 30, 1863.

First Lieutenant Thomas W. Nash, promoted to captain, and transferred to company B January 1, 1865.

Second Lieutenant Albert Durkee, 1862, promoted from corporal to second lieutenant April 13, 1862; resigned July 9, 1862.

Second Lieutenant William B. Quirk, joined for duty September 19, 1862; resigned October 27, 1862.

Second Lieutenant Theodore L. Gould, 1862, promoted from first sergeant October 27, 1862; discharged for disability at Georgetown, District of Columbia, no date.

Second Lieutenant George Hayward, killed at Gettysburg, Pennsylvania, July 3, 1863.

First Sergeant Nathan L. Parmeter, promoted to commissary sergeant, transferred to non-commissioned staff, June 16, 1865.