Many unit histories and rosters can be found on the internet. If you are doing research on units or individuals, check out the sites highlighted below. These links are portals to a wealth of historical and genealogical information. Furthermore, each of these sites contains numerous additional links for even more information. The information includes unit histories, books about units and individuals, rosters, census records, cemetery records, battles, photographs, preservation groups and all kinds of genealogical information. For help in getting started in finding information on your Civil War ancestor, click here.

* Library of Congress
* Library of Congress Civil War Photographs
* The National Archives
* National Union Catalog of Manuscript Collections
* Links to archives and manuscript collections This is a great site maintained by Columbia University. If you do not find the library or archive listed below that you are looking for, try this link or the one directly below run by the U. of Idaho.
* Links to archives and manuscript collections Another great site maintained by the University of Idaho
* Cyndi's List of Genealogy Sites on the Internet. This is a very comprehensive site of links to genealogical websites around the world.
* Links to Civil War Websites These websites are portals to numerous Civil War related internet sites.

UNION SOURCES

CONNECTICUT
* Connecticut State Archives Civil War
Materials Finding Aid
* Connecticut Regiments
* Connecticut Rosters
* Connecticut Historical Society Manuscript Collection
DELAWARE
* Delaware Public Archives
* Delaware Regiments
* Delaware Rosters
ILLINOIS
* Illinois in the Civil War
* Illinois Soldiers, data base from the Illinois State Archives
* Illinois Regiments
* Illinois Rosters
INDIANA
* Indiana State Archives
* Indiana in the Civil War
* Civil War Indiana
* Indiana Rosters
* Indiana Regiments
* Indiana Historical Society
* University of Notre Dame Civil War Manuscript Collections
MAINE
* Maine State Archives
* Maine Regiments
* Maine Rosters
MARYLAND USA & CSA
* Maryland State Archives
* Maryland Regiments (USA & CSA)
* Maryland Rosters (USA & CSA)
* Maryland Historical Society
* Maryland Genealogy
MASSACHUSETTS
* Massachusetts Civil War Research Center
* Massachusetts Regiments
* Massachusetts Rosters
* Massachusetts Civil War Websites
MICHIGAN
* Michigan in the Civil War
* Michigan Rosters
* Michigan Regiments
* University of Michigan, Manuscript Division of the William L. Clements Library
MINNESOTA
* Minnesota State Archives
* Minnesota Rosters
* Minnesota Regiments
* Minnesota Historical Society
NEW HAMPSHIRE
* New Hampshire State Archives
* New Hampshire Regiments
* New Hampshire Rosters
* New Hampshire Civil War History and Genealogy Project
* New Hampshire Historical Society
NEW JERSEY
* New Jersey State Archives
* New Jersey in the Civil War
* New Jersey Regiments
* New Jersey Rosters
* New Jersey Genealogy
NEW YORK
* New York State Archives
* New York State and the Civil War
* New York Regiments
* New York Rosters
OHIO
* Ohio in the Civil War
* Ohio Rosters
* Ohio Regiments
* Bowling Green State University Collections
* Wright State University Civil War Special Collections
PENNSYLVANIA
* Pennsylvania State Archives
* Pennsylvania Civil War Veterans Information Cards contained in Samuel Bates' History of Pennsylvania Volunteers.
* Pennsylvania Regiments
* Pennsylvania Rosters
* Pennsylvania Volunteers in the Civil War A website of searchable Pennsylvania rosters
RHODE ISLAND
* Rhode Island State Archives
* Rhode Island Civil War Soldiers
* Rhode Island Regiments
* Rhode Island Rosters
* Brown University Special Collections
U.S. REGULARS
* U.S. Regular Regiments
VERMONT
* Vermont in the Civil War Includes Rosters
* Vermont State Archives
* Vermont Rosters
* Vermont Regiments
* Vermont Historical Society
WEST VIRGINIA
* West Virginia State Archives
* West Virginia in the Civil War
* West Virginia Regiments
* West Virginia Rosters
* West Virginia Civil War Soldier Data Base
* West Virginia University Guide to Manuscripts and Archives
WISCONSIN
* Wisconsin State Historical Society
* Wisconsin Goes to War
* Wisconsin Rosters
* Wisconsin Regiments
* Wisconsin Urban Archives Civil War Collection 

CONFEDERATE SOURCES

ALABAMA
* Alabama State Archives
* Alabama Rosters A-L A searchable database for soldiers' names.
* Alabama Infantry Regiments
* Alabama Rosters, A different website from the one listed above.
* Alabama Regiments
* Auburn University Civil War Manuscript Collection
ARKANSAS
* Arkansas History Commission & State Archives
* Arkansas Regiments
* Arkansas Rosters
* University of Arkansas Civil War Manuscripts
FLORIDA
* Florida State Archives
* Florida in the Civil War
* Florida Rosters
* Florida Regiments
* Florida Pension Application Files
* Florida Soldiers
GEORGIA
* Georgia State Archives
* Georgia Digital Library Diaries, letters, newspapers, etc. in both digital and transcribed formats.
* Civil War Georgia
* Georgia Rosters
* Georgia Regiments
* Georgia Units
* Emory University Civil War Manuscript Collections
LOUISIANA
* Louisiana State Archives
* Louisiana Digital Library Collections Contains sections of the antebellum and Reconstruction periods
* Louisiana Regiments
* Louisiana Rosters
MARYLAND
Confederate Soldiers Buried in Maryland
MISSISSIPPI
* Mississippi State Archives
* Mississippi Civil War Information
* Mississippi Rosters
* Mississippi Regiments
* University of Mississippi Civil War Manuscript Collections
NORTH CAROLINA
* North Carolina Civil War Home Page
* North Carolina Rosters
* North Carolina Regiments
* Duke University Special Collections
* University of North Carolina, Southern Historical Collection
SOUTH CAROLINA
* South Carolina State Archives
* South Carolina in the Civil War by Mac Wyckoff
* The Civil War in South Carolina
* South Carolina and the Civil War
* South Carolina Regiments
* South Carolina Rosters
* South Caroliniana Library Manuscript Collection
* South Carolina Genealogy
TENNESSEE
* Tennessee State Archives
* Tennessee Civil War Home Page
* Tennessee and the Civil War
* Tennessee Regiments
* Tennessee Rosters
* University of Tennessee Library
* Tennessee Genealogy
TEXAS
* Texas State Archives
* Texas Regiments
* Texas Rosters
* Texans in the Civil War
* Texas Pension Records
* Rice University Manuscript Collection
VIRGINIA
* Library of Virginia
* Virginia Civil War Home Page
* Virginia Rosters
* Virginia Regiments
* Virginia Historical Society
* Virginia Military Institute Archives
* Civil War Resources in the Virginia Tech Libraries Special Collections (some manuscripts online)
* The Virginia Historical Inventory This is a collection of detailed reports, photographs, and maps documenting the architectural, cultural, and family histories of thousands of 18th and 19th century buildings in Virginia. There are 19,300 reports, 6,200 photographs and 103 county and city maps.