Massachusetts Civil War Union Infantry Units

The information in this list of Massachusetts Military Units comes from the Civil War Soldiers and Sailors web site (CWSS). This web site can also be searched by the name of a soldier.

Regiments 1st through 3rd

 * 1st Unattached Company, Massachusetts Infantry (Militia) Mustered in for 90 days' service April 29, 1864. Duty at Fort Independence, Boston Harbor. Mustered out August 1, 1864.


 * 2nd Unattached Company, Massachusetts Infantry Organized November 3, 1862, for garrison duty in the forts of Boston Harbor, on duty at Fort Warren until April, 1863, when assigned to 1st Battalion Heavy Artillery as Company "B".


 * 2nd Unattached Company, Massachusetts Infantry (Militia)(90 days, 1864) Organized November 3, 1862, for garrison duty in the forts of Boston Harbor, duty at Fort Warren till April, 1863, when assigned to 1st Battalion Heavy Artillery as Company "B".


 * 2nd Unattached Company, Massachusetts Infantry (Militia)(100 days, 1864) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 2nd Unattached Company, Massachusetts Infantry (Militia) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 2nd Regiment, Massachusetts Infantry Organized at Camp Andrew, West Roxbury, and mustered in May 25, 1861. Mustered out July 11, and discharged at Boston, Mass., July 26, 1865.


 * 3rd Unattached Company, Massachusetts Infantry (Militia) Mustered in for 90 days' service May 3, 1864. Mustered out August 5, 1864.


 * 3rd Regiment, Massachusetts Infantry Organized at Lakeville September, 1862. Mustered out June 26, 1863.


 * 3rd Regiment, Massachusetts Infantry (Militia) Left Boston on Steamer "S. R. Spaulding" for Fortress Monroe, Va., April 17, 1861. Ordered home July 16, and mustered out July 22, 1861. Expiration of term.

Regiments 4th through 5th

 * 4th Battalion, Massachusetts Infantry (Militia) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 4th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville, Mass., and mustered in for 90 days' service May 3, 1864. Mustered out August 6, 1864.


 * 4th Regiment, Massachusetts Infantry Organized at Camp Joe Hooker, Lakeville, and mustered in September 23, 1862. Mustered out August 28, 1863.


 * 4th Regiment, Massachusetts Infantry (Militia) Organized at Boston May 27, 1862. Mustered out May 31, 1862.


 * 4th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) Left Boston for Fortress Monroe, Va., on Steamer "State of Maine" April 17, 1861, arriving there April 20. Mustered out July 22, 1861.


 * 5th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville, Mass., and mustered in for 90 days' service May 4, 1864. Mustered out August 2, 1864.


 * 5th Regiment, Massachusetts Infantry (9 months, 1862-63) Tendered services to government for nine months August 14, 1862. Moved to Boston June 22-25, and there mustered out July 2, 1863.


 * 5th Regiment, Massachusetts Infantry (100 days, 1864) (Militia)Tendered services to the government for 100 days July, 1864. Ordered home November 6, 1864. Mustered out November 16, 1864.


 * 5th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) Tendered services to the government April 15, 1861. Ordered to Boston July 29, and there mustered out August 1, 1861.


 * 5th Regiment, Massachusetts Infantry (Militia) "Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.

Regiments 6th through 8th

 * 6th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 4, 1864. Duty at Readville. Mustered out August 2, 1864.


 * 6th Regiment, Massachusetts Infantry (9 months, 1862-63) Organized at Camp Wilson, Lowell, and mustered in August 31,1862. Moved to Boston May 26-29, 1863, and there mustered out June 3, 1863.


 * 6th Regiment, Massachusetts Infantry (100 days, 1864) (Militia) Organized at Readville and mustered in July 14-19, 1864. Moved to Boston October 19-21, 1864. Mustered out October 27, 1864.


 * 6th Regiment, Massachusetts Infantry (3 months, 1861) (Militia) Tendered services to government January 21, 1861. Relieved from duty July 29, and mustered out August 2, 1861.


 * 6th Regiment, Massachusetts Infantry (Militia) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 7th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 4, 1864. Mustered out August 5, 1864.


 * 7th Regiment, Massachusetts Infantry Organized at Taunton and mustered in June 15, 1861. Moved to Taunton, Massachusetts, June 16-20, and there mustered out July, 1864, expiration of term.


 * 8th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 10, 1864. At Gallop's Island, Boston Harbor, until August. Mustered out August 11, 1864.


 * 8th Regiment, Massachusetts Infantry (9 months, 1862-63) Organized at Camp Lander, Wenham. Ordered home July 26 and mustered out August 7, 1863.


 * 8th Regiment, Massachusetts Infantry (100 days, 1864) Militia Organized at Readville July 13 to 26, 1864. Left State for Baltimore, Maryland, July 26. Moved to Massachusetts October 28, and mustered out November 10, 1864.


 * 8th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 10, 1864. At Gallop's Island, Boston Harbor, until August. Mustered out August 11, 1864.


 * 8th Regiment, Massachusetts Infantry (3 months, 1861) Militia One of the first four Regiments to respond to the call after opening of hostilities. Gathered at Boston April 16, 1861. Mustered out August 1, 1861.

Regiments 9th through 13th

 * 9th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 10, 1864. Mustered out August 11, 1864.


 * 9th Regiment, Massachusetts Infantry Organized at Boston June 11, 1861. Mustered out June 21.


 * 10th Regiment, Massachusetts Infantry Organized at Springfield June 21, 1861. Ordered home for muster out June 19. Mustered out July 6, 1864.


 * 10th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 10, 1864. Mustered out August 8, 1864.


 * 11th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service May 16, 1864. Mustered out August 15, 1864.


 * 11th Regiment, Massachusetts Infantry Organized at Readville, mustered in June 13, 1861. Mustered out June 14, 1865.


 * 12th Unattached Company, Massachusetts Infantry (Militia) Organized at Fort Warren and mustered in June 26, 1861. Ordered home for muster out June 25. Mustered out July 8, 1864.


 * 12th Regiment, Massachusetts Infantry Organized at Readville October 3 to December 29, 1862. Mustered out July 25. 1865.


 * 13th Regiment, Massachusetts Infantry Organized at Readville and mustered in for 90 days' service May 16, 1864.Duty at Fort Clark's Point, New Bedford, Mass.  Mustered out August 15, 1864.


 * 13th Unattached Company, Massachusetts Infantry (Militia) Organized at Fort Independence June 16, 1861. Mustered out August 1, 1864.

Regiments 15th through 17th

 * 15th Unattached Company, Massachusetts Infantry (Militia) Organized at Worcester and mustered in June 12, 1861. Mustered out July 28, 1864. Veterans and Recruits transferred to 20th Massachusetts.


 * 15th Regiment, Massachusetts Infantry Organized at Lowell and Fort Warren and mustered in February 17, 1863. Mustered out August 4, 1865.


 * 16th Unattached Company, Massachusetts Infantry Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 16th Unattached Company, Massachusetts Infantry (Militia) Organized at Camp Cameron, Cambridge, June 29, 1861. Mustered out July 27, 1864.


 * 16th Regiment, Massachusetts Infantry Organized at Camp Meigs, Readville, and mustered in April 4, 1864. Ordered to Massachusetts and mustered out July 13, 1865.


 * 17th Regiment, Massachusetts Infantry Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 17th Unattached Company, Massachusetts Infantry Organized at Readville and mustered in for 90 days' service August 5, 1864. Mustered out November 12, 1864. Again mustered in for one year at Salem. Mustered out June 30, 1865.


 * 17th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 90 days' service August 5, 1864. Mustered out November 12, 1864. Again mustered in for one year at Salem. Mustered out June 30, 1865.


 * 17th Unattached Company, Massachusetts Infantry (Militia) (1 year, 1864-65) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 17th Unattached Company, Massachusetts Infantry (Militia) (100 days, 1864) Organized at Lynnfield July 22, 1861. Mustered out at Greensboro, N. C., July 11, 1865.

Regiments 18th through 20th

 * 18th Unattached Company, Massachusetts Infantry Organized at Readville and mustered in for 100 days August 6, 1864. Duty at Camp Meigs, Readville. Mustered out November 14, 1864. Re-enlisted and mustered in for one year December 6,1864. Mustered out May 12, 1865.


 * 18th Unattached Company, Massachusetts Infantry (Militia) (100 days, 1864) Organized at Readville and mustered in for 100 days August 6, 1864. Duty at Camp Meigs, Readville. Mustered out November 14, 1864. Re-enlisted and mustered in for one year December 6, 1864 Duty at Camp Meigs, Readville. Mustered out May 12, 1865.


 * 18th Regiment, Massachusetts Infantry Organized at Readville and Boston and mustered in August 27, 1861. Consolidated with 32nd Massachusetts Infantry October 21, 1864.


 * 19th Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 100 days August 9, 1864. Mustered out November 16, 1864. Reorganized and mustered in for one year November 25, 1864. Mustered out June 27,1865.


 * 19th Regiment, Massachusetts Infantry Organized at Readville and mustered in for 100 days August 9, 1864. Mustered out June 27, 1865.


 * 19th Unattached Company, Massachusetts Infantry (1 year, 1864-65) Organized at Lynnfield August 28, 1861. Mustered out June 30 and discharged July 22, 1865.


 * 20th Regiment, Massachusetts InfantryOrganized at Readville and mustered in for 100 days August 11, 1864. Mustered out November 18, 1864. Again mustered in for one year November 17, 1864. Mustered out June 29, 1865.


 * 20th Unattached Company, Massachusetts Infantry (1 year,1864-65) Organized at Readville and mustered in for 100 days August 11, 1864. Mustered out November 18, 1864. Again mustered in for one year November 17, 1864. Mustered out June 29, 1865


 * 20th Unattached Company, Massachusetts Infantry (100 days, 1864)(Militia) Organized at Readville August 29 to September 4, 1861. Left State for Washington, D. C., September 4.Grand Review May 23. Duty at Washington until July 15. Mustered out July 16 and discharged July 28, 1865.

Regiments 21st through 25th

 * 21st Unattached Company, Massachusetts Infantry Organized at Readville and mustered in for 100 days August 11, 1864. Mustered out November 18, 1864. Reorganized at Fall River, Mass., for one year, and mustered in November 23, 1864. Stationed at Provincetown. Mustered out June 28, 1865.


 * 21st Unattached Company, Massachusetts Infantry (100 days,1864)(Militia) Organized at Readville and mustered in for 100 days August 11, 1864. Stationed at Long's Point, Provincetown. Mustered out November 18, 1864. Reorganized at Fall River, Mass., for one year. Mustered in November 23, 1864. Stationed at Provincetown. Mustered out June 28, 1865.


 * 21st Regiment, Massachusetts Infantry. Organized at Worcester July 19 to August 19, 1861. Moved to Baltimore, Md., August 23-25; thence to Annapolis, Md., August 29; and duty there till January 6, 1862. Attached to Reno's 2nd Brigade, Burnside's Expeditionary Corps, to April, 1862. 2nd Brigade, 2nd Division, Dept. of North Carolina, to July, 1862. 2nd Brigade, 2nd Division, 9th Army Corps, Army of the Potomac, to April, 1863. 2nd Brigade, 2nd Division, 9th Army Corps, Dept. of the Ohio, to June, 1863. Unassigned, 1st Division, 23rd Army Corps, Dept. of the Ohio, to October, 1863. 1st Brigade, 2nd Division, 9th Army Corps, Dept. of the Ohio, to April, 1864. 2nd Brigade, 1st Division, 9th Army Corps, Army of the Potomac, to June, 1863. 1st Brigade, 1st Division, 9th Army Corps, to September, 1864. 2nd Brigade, 1st Division, 9th Army Corps, to October, 1864. Non-Veterans left front August 18 and mustered out August 30, 1864. Veterans and Recruits transferred to 36th Massachusetts Infantry October 21, 1864.


 * 22nd Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 100 days' service August 18, 1864. Duty at Camp Meigs, Readville. Mustered out November 2, 1864.
 * 22nd Regiment, Massachusetts Infantry Orginized at Lynnfield September 4 to October 6, 1861. Moved to Washington, D. C., October 8-11. Attached to Martindale's Brigade, Porter's Division, Army of the Potomac, to March, 1862. 1st Brigade, 1st Division, 3rd Army Corps, Army of the Potomac, to May, 1862. 1st Brigade, 1st Division, 5th Army Corps, to March, 1864. 2nd Brigade, 1st Division, 5th Army Corps, to October, 1864. Relieved August 8 and guard duty at City Point till October 5. Mustered out October 17, 1864.


 * 23rd Unattached Company, Massachusetts Infantry (Militia) Organized at Readville and mustered in for 100 days August 18, 1864. Duty at Camp Meigs, Readville. Mustered out November 26, 1864.


 * 23rd Regiment, Massachusetts Infantry Organized September 28, 1861.Mustered out June 25, 1865.
 * 24th Company Unattached, Massachusetts Infantry Organized at Plymouth and mustered in for one year's service December 16-22, 1864. Duty at Camp Meigs, Readville. Mustered out May 12, 1865.


 * 24th Regiment, Massachusetts Infantry Organized at Readville September to December, 1861. Mustered out January 20, 1866.


 * 25th Company Unattached, Massachusetts Infantry Organized at Salem and mustered in for one year's service December 9, 1864. Stationed at Fort Miller, Marblehead. Mustered out June 29, 1865.


 * 25th Regiment, Massachusetts Infantry Organized at Worcester September 1to October 31, 1861. March, 1864. Mustered out July 28, 1865.

Regiments 26th through 33rd

 * 26th Company Unattached, Massachusetts Infantry Organized at New Bedford and mustered in for one year's service December 13, 1864. Duty at Camp Meigs, Readville. Mustered out May 12, 1865.


 * 26th Regiment, Massachusetts Infantry Organized at Camp Cameron, Cambridge, August 28, 1861. Moved to Boston, Mass., September 12-18, and there discharged from service.


 * 27th Company Unattached, Massachusetts Infantry Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.
 * 27th Regiment, Massachusetts Infantry Organized at Springfield and mustered in September 20, 1861. Mustered out June 26, 1865. Old members mustered out September 27, 1864.


 * 28th Regiment, Massachusetts Infantry Organized at Cambridge and Boston December 12, 1861. Mustered out June 29, 1865.


 * 30th Regiment, Massachusetts Infantry Organized at Newport News, Va., December, 1861, from 1st Battalion Massachusetts Infantry (7 Cos.) and 3 new Companies ("F," "G" and "H") organized December 13-17, 1861, which joined Regiment at Newport News, Va., January 17, 1862. Mustered out July 29, 1865.


 * 30th Regiment, Massachusetts Infantry Organized as "Eastern Bay State Regiment" at Camp Chase, Lowell, December 31, 1861. Duty in various locations, then duty in 3rd Sub-District Eastern South Carolina until December 1865. Mustered out December 1, 1865.


 * 31st Regiment, Massachusetts Infantry "Western Bay State Regiment," organized at Pittsfield, November 20, 1861, to February 20, 1862. Served in various locations, then moved to Boston September 11-24, and discharged September 30, 1865.


 * 32nd Regiment, Massachusetts Infantry Organized as a Battalion of 6 Companies for garrison duty at Fort Warren, Boston Harbor, November 25, 1861. Mustered out June 29, and discharged July 11, 1865.


 * 33rd Regiment, Massachusetts Infantry Organized at Springfield August 6, 1862. Mustered out June 11 and discharged from service July 2, 1865.

Regiments 34th through 43rd

 * 34th Regiment, Massachusetts Infantry Organized at Worcester August 1, 1862. Mustered out June 16, 1865.


 * 35th Regiment, Massachusetts Infantry Organized at Worcester August 1, 1862. Mustered out June 9, and discharged from service June 27, 1865.


 * 37th Regiment, Massachusetts Infantry Orgarnized at Pittsfield August 30, 1862. Mustered out June 30, 1865.


 * 38th Regiment, Massachusetts Infantry Organized and mustered in August 24, 1862. Mustered out June 30, 1865. Moved to Boston Mass., June 30-July 5. Discharged July 13, 1865.


 * 39th Regiment, Massachusetts Infantry Organized at Lynnfield August 13 to Septembr 2, 1862. Grand Review May 23. Mustered out June 1, 1865.


 * 40th Regiment, Massachusetts Infantry Organized at Lynnfield August, 1862.Mustered out June 16, and discharged at Reedville, Mass., June 30, 1865.


 * 40th Regiment, Massachusetts Militia Infantry Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * 42nd Regiment, Massachusetts Infantry Organized at Camp Meigs, Reedville, November 11, 1862. Mustered out August 20, 1863.


 * 42nd Regiment, Massachusetts Infantry (100 days, 1864) (Militia) Organized at Reedville for 100 days July 22, 1864 Mustered out November 11, 1864.


 * 43rd Regiment, Massachusetts Infantry (Militia) Organized at Camp Meigs, Readville, September 12 to October 23, 1862. . Mustered out July 30, 1863.

Regiments 44th through 53rd

 * 44th Regiment, Massachusetts Infantry (Militia) Organized at Readville and mustered in September 12, 1862. Moved to Boston, Mass., June 6-10. Mustered out June 18, 1863.


 * 45th Regiment, Massachusetts Infantry (Militia) Organized at Camp Meigs, Readville, September 26-October 28, 1862. . Mustered out July 8, 1863.


 * 46th Regiment, Massachusetts Infantry (Militia) Organized at Springfield September 25-October 30, 1862. Moved to Boston July 15-17, thence to Springfield and there mustered out July 29, 1863.


 * 47th Regiment, Massachusetts Infantry (Militia) Organized at Boxford and Readville October 16, 1862. Moved to Boston, Mass, August 3-18, and mustered out September 1, 1863.


 * 48th Regiment, Massachusetts Infantry (Militia) Organized at Wenham and mustered in October 29, 1862. Mustered out September 3, 1863.


 * 49th Regiment, Massachusetts Infantry (Militia) Organized at Pittsfield and mustered in October 28, 1862. Mustered out September 1, 1863.


 * 50th Regiment, Massachusetts Infantry (Militia) Organized at Boxford. Mustered out August 24, 1863.


 * 51st Regiment, Massachusetts Infantry (Militia) Organized at Worcester September 25 to October 30, 1862. Mustered out July 27, 1863.


 * 52nd Regiment, Massachusetts Infantry (Militia) Organized at Greenfield October, 1862. Moved to Massachusetts July 23-August 3. Mustered out August 14, 1863.


 * 53rd Regiment, Massachusetts Infantry (Militia) Organized at Groton Junction October 17 to November 6, 1862. Mustered out September 2, 1863.

Regiments 54th through 62nd

 * 54th Regiment, Massachusetts Infantry (Colored) Organized at Readville and mustered in May 13, 1863. Mustered out at Mount Pleasant, S. C., August 20, 1865. Discharged at Boston, Mass., September 1, 1865.


 * 55th Regiment, Massachusetts Infantry (Colored) Organized at Readville and mustered in June 22, 1863. Mustered out August 29, 1865. Discharged at Boston, Mass., September 23, 1865.


 * 56th Regiment, Massachusetts Infantry Organized at Readville December 26, 1863, to February 24, 1864. Mustered out July 12, 1865.


 * 57th Regiment, Massachusetts Infantry Organized at Worcester and Reedville and mustered in April 6, 1864. Mustered out July 30, 1865.


 * 58th Regiment, Massachusetts Infantry Organized at Readville December 26, 1863, to February 24, 1864.Duty at Washington and Alexandria till July,.mustered out July 12, 1865.


 * 59th Regiment, Massachusetts Infantry Organized at Reedville December 3, 1863, to April 20, 1864. Consolidated with 57th Massachusetts Infantry May 26, 1865.


 * 60th Regiment, Massachusetts Infantry (Militia) Organized for 100 days August 1, 1864. Mustered out November 30, 1864.


 * 61st Regiment, Massachusetts Infantry Organized at Gallop's Island, Boston Harbor, August to October, 1864. Mustered out July 16. Moved to Reedville, Mass., July 20, 22, and discharged August 1, 1865.


 * 62nd Regiment, Massachusetts Infantry Organization commenced April, 1865, but not completed, mustered out May 5, 1865.

Regiments A through Z

 * Boston Cadets, Massachusetts Infantry (Militia) Mustered in May 26, 1862. Stationed at Fort Warren, Boston Harbor. Mustered out July 2, 1862.


 * Harvard Regiment, see 20th Regiment, Massachusetts Infantry.


 * Salem Cadets, Massachusetts Infantry (Militia) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.


 * Staten's Company, Massachusetts Infantry (Militia) Compendium of the War of the Rebellion" by Frederick H. Dyer contains no history for this unit.