15th Regiment, Connecticut Infantry

Brief History - "The Lyon Regiment"
The 15th Regiment, Connecticut Infantry was organized at New Haven, Connecticut and mustered in August 25, 1862. This regiment was mustered out June 27, 1865 and discharged at New Haven July 12, 1865.

For more information on the 15th Regiment Infantry and its history, see:


 * Thorpe, Sheldon Brainard, The History of the Fifteenth Connecticut Volunteers in the War for the Defense of the Union, 1861-1865, (New Haven : The Price, Lee and Adkins Co., 1893). Available online at OpenLibrary, (accessed 9 Mar 2011).
 * The Civil War Archive section, 15th Regiment Infantry, (accessed 19 April 2012).

Companies in this Regiment
The Civil War Soldiers and Sailors database lists 2,453 men on its roster for this unit. Roster.

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 New Haven County.

Company A

Company B

Company C

Company D

Company E

Company F

Company G

Company H

Company I

Company K

Company Rosters

 * Connecticut. Adjutant General's Office, Catalogue of Connecticut volunteer organizations, with additional enlistments and casualties to July 1, 1864, (Hartford, Connecticut : Case, Lockwood, 1864), page 526. Available Online at Internet Archive, (accessed 8 Mar 2011).  Also available at the Family History Library,  or FHL US/CAN Film 1550802.


 * Adjutant General's Office, 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, (Bethesda, Maryland : University Publications of America, c1991), page 607. Includes index. Online at Internet Archive, (accessed 8 Mar 2011).  Also available at the Family History Library,  or

Other Sources

 * Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Connecticut in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).


 * National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.


 * Connecticut in the Civil War describes many Confederate and Union sources, specifically for Connecticut, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.


 * United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.


 * Footnote.com, (accessed 2 Apr 2011). (A subscription website, but is available for use at the Family History Library and some Family History Centers). It has digital Civil War soldier service records and brief regiment histories (located at the bottom of some of the muster rolls).


 * The Civil War in the East - Timeline of the 15th Connecticut Infantry Regiment


 * The Stamford Historical Society - History and Roster


 * Thorpe, Sheldon B. (Sheldon Brainerd). The history of the Fifteenth Connecticut Volunteers in the war for the defense of the Union, 1861-1865. (Bethesda, Maryland : University Publications of America, c1991),.