21st Regiment, Connecticut Infantry

Connecticut in the Civil War

Brief History
The 21st Regiment, Connecticut Infantry was organized in August of 1862 at Norwich, New London County, Connecticut and mustered in on the 5th of September. This regiment was mustered out of service June 16, 1865.

For more information about the 21st Regiment Infantry and its history, see:


 * Regimental History - The Story of the Twenty-First Regiment, Connecticut Volunteer Infantry during the Civil War, by members of the regiment - Online book

Companies in this Regiment
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first. This regiment was composed of men from all parts of Connecticut, but the majority of men in each unit resided in the following counties:

Company A

Company B was largely formed by men from Hartford County.

Company C was largely formed by men from New London County.

Company D

Company E was largely formed by men from New London County.

Company F was largely formed by men from New London County.

Company G was largely formed by men from New London County.

Company H was largely formed by men from New London County.

Company I was largely formed by Middlesex County.

Company K was largely formed by men from Windham County.

Company Rosters

 * Catalogue of Connecticut volunteer organizations, with additional enlistments and casualties to July 1, 1864. Compiled From Records in the Adjutant General's Office and Published by Order of the Legislature, by Horace J. Morse - Adjutant General - Online Book. Or FHL Collection on FHL US/CAN Fiche 6082886 (9 fiche) or FHL US/CAN Book 974.6 M2a.


 * Catalogue of Connecticut volunteer organizations: (infantry, cavalry, and artillery,) in the service of the United States, 1861-1865, with additional enlistments, casualties, &amp;c., &amp;c., and brief summaries, showing the operations and service of the several regiments and batteries (1869) by Connecticut. Adjutant-General's Office; Ingersoll, Colin M. (Colin Macrae), 1819-1904 - Online Book. Or FHL Collection FHL US/CAN Fiche 6082887 (10 fiche) or FHL US/CAN Film 1033670 Item 1.

Source Material

 * The Civil War in the East - Timeline of the 21st Connecticut Infantry Regiment