• The Civil War Soldiers and Sailors System indexes approximately 5 million Civil War soldiers
• The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies
• Civil War Regimental Index from Dyer's Compendium
• Jefferson Davis Estate Papers online

• Civil War Collection at Ancestry Includes indexes to pension and service records and some state rosters
• Civil War Service Records
• Civil War Pension Index: General Index to Pension Files, 1861-1934
• Tennessee, Civil War Confederate Pension Applications Index
• Civil War General Officers
• Civil War regiments
• Civil War soldiers
• <Confederate States Field Officers
• List of staff officers of the Confederate States Army
• Record of the Services of the 7th Regiment, U.S. Colored Troops : from September, 1863 to November, 1866
• The 14th Regiment Rhode Island Heavy Artillery (Colored) in the War to Preserve the Union, 1861-1865
• A Brief Sketch of the Organization and Services of the 59th Regiment of United States Colored Infantry : and Biographica

• Civil War Burials Database Project
• Civil War Veterans Buried in Mexico City National Cemetery or the Corozal American Cemetery
• Andersonville Prisoners of War
• Prison diary, of Michael Dougherty, late Co. B, 13th. Pa. Cavalry

Alabama

• Alabama Civil War Service Database (surnames A - R
• Pardons by the President : final report of the names of persons who lived in Alabama, Virginia, West Virginia, or Georgia

Arkansas

• Arkansas Confederate Home Index Search
• Burial Places of Union and Confederate Soldiers in Arkansas by Edward G. Gerdes

Colorado

• Colorado Civil War Volunteers
• Colorado Civil War Veterans (Grand Army of the Republic membership)
• Colorado Civil War Casualties
• Colorado State Veterans' Grave Registrations, 1862-1949

Connecticut

• Connecticut's Civil War and Spanish American War Pension Records
• Connecticut's Deceased Veterans Discharge Files 1882-1936

Delaware

• Delaware Roster of Union Soldiers
• Delaware's Union Colored Troops

Florida

• Florida Confederate Pension Applications
• Florida Confederate Pension Application Files  
• Complete Florida Confederate Pension Application Index PDF download

Georgia

• Georgia Civil War Pension Records
• Civil War Resources at the Georgia Archives
• Index to Georgia Confederate Pension Applications
• Georgia Confederate Pension Applications
• Pardons by the President : final report of the names of persons who lived in Alabama, Virginia, West Virginia, or Georgia

Idaho

• Idaho Civil War Veterans

Illinois

• Illinois Civil War Database
• 1929 Illinois Roll of Honor
• Illinois Civil War Rosters Free on RootsWeb
• Rock Island County - Confederate Dead at Rock Island Prison (Arsenal Island) on RootsWeb Free
• Illinois Civil War Rosters

Indiana

• Indiana Soldier's & Sailor's Childrens Home

Iowa

• Iowa in the Civil War

Kansas

• Kansas Civil War Veteran's Database
• Kansas in the Civil War
• Necrology of the Kansas State Grand Army of the Republic
• Kansas State Military Databases

Kentucky

• Kentucky Confederate Volunteers
• Kentucky Civil War Union Volunteers
• Researching Your Kentucky Civil War Ancestors

Louisiana

• Louisiana Confederate Pension Applications Index
• A Southern record : the history of the Third Regiment Louisiana Infantry
• Louisiana Confederate Soldiers

Maryland

• Maryland State Archives - Military Records Online
• History and Roster of Maryland Volunteers War of 1861-1865 Vol. 1
• History and Roster of Maryland Volunteers War of 1861-1865 Vol. 2

Massachusetts

• Massachusetts Civil War Research Center

Minnesota

• Minnesota Civil War Soldiers
• History of the Fourth Regiment of Minnesota Infantry Volunteers during the Great Rebellion, 1861-1865
• Narrative of the service of the Second Regiment, Minnesota Veteran Volunteer Infantry
• Minnesota in the Civil and Indian Wars, 1861-1865

Mississippi

• The Jefferson Davis Estate Papers at the Mississippi Dept. of Archives and History
• Vicksburg and Warren County, Mississippi : Tunica Indians, Quebec missionaries, Civil War veterans
• History of the Ram Fleet and the Mississippi Marine Brigade in the War for the Union on the Mississippi

Missouri

• Missouri Men Who Served in Illinois Civil War Regiments
• Missouri Men Who Served in Kansas Civil War Regiments
• Missouri Confederate Death Records
• Missouri Confederate Volunteers
• Missouri's Union Provost Marshal Papers: 1861-1866
• Missouri Soldiers Database, War of 1812 - WWI
• Missouri's Union Provost Marshal Papers: 1861-1866
• Civil War and Masonry in Missouri
• Adjutant General's report of Missouri state militia
• Missouri Civil War Records on Ancestry

Nebraska

• Nebraska Civil War Veterans (Grand Army of the Republic membership)
• Nebraska 1893 Census of Civil War Veterans
• Roster of Nebraska volunteers from 1861 to 1869
• Nebraska Civil War Veterans

New Hampshire

• New Hampshire Civil War Archives
• Revised register of the soldiers and sailors of New Hampshire in the War of the Rebellion, 1861-1866
• A history of the 2nd Regiment, New Hampshire Volunteer Infantry, in the War of the Rebellion
• A history of the 5th Regiment New Hampshire Volunteers, in the American Civil War
• Complete roster of the 8th Regiment, New Hampshire Volunteers
• A history of the 11th New Hampshire Regiment, Volunteer Infantry in the Rebellion War

New Jersey

• Record of Officers and Men of New Jersey in the Civil War 1861-1865
• Register of the commissioned officers and privates of the New Jersey Volunteers, in the service of the United States
• History of Battery B, First New Jersey Artillery
• History of the Eleventh New Jersey Volunteers : from its organization to Appomattox

New York

• New York Civil War Database
• New York State Civil War Database
• New York Civil War Records (1861-65)
• The 1st New York (Lincoln) Cavalry : from April 19, 1861 to July 7, 1865
• History of the 3rd Regiment, Excelsior Brigade, 72d New York Volunteer Infantry, 1861-1865
• Historic records of the 5th New York Cavalry, 1st Ira Harris Guard
• The 9th Regiment New York Volunteers (Hawkins' Zouaves)
• Chronicles of the 21st Regiment New York State Volunteers
• The Dutchess County Regiment : (150th Regiment of New York State Volunteer Infantry) in the Civil War
• Chronicles of the 151st Regiment New York State Volunteer Infantry, 1862-1865
• Alphabetical card-index of the rolls of the 164th New York Infantry

North Carolina

• NC Confederate Pension Application Request Form
• Roster of North Carolina troops in the war between the states

Ohio

• Ohio Civil War Documents
• Links to Ohio Civil War Rosters
• Lincoln's body guard, the Union Light Guard of Ohio
• History of the 3rd Ohio Veteran Volunteer Cavalry
• The 25th Ohio Vet. Vol. Infantry in the War for the Union
• History of the 30th Regiment Ohio Volunteer Infantry : from its organization to the fall of Vicksburg, Miss.
• Ohio State Archives - Civil War Searchable Databases

Oklahoma

• Index to Oklahoma's Confederate Pension Records
• Index to Oklahoma Confederate Pension Records (pdf download)
   

Pennsylvania

• Pennsylvania Civil War Veterans' Card File Index 1861-1866
• Pennsylvania Military Index
• History of the 45th Regiment, Pennsylvania Veteran Volunteer Infantry, 1861-1865
• Pennsylvania Veteran Volunteers : a history of the 93rd Regiment (Lebanon Infantry)
• History of the Philadelphia Brigade : 69th, 71st, 72nd, and 160th Pennsylvania Volunters

Rhode Island

• The 14th Regiment Rhode Island Heavy Artillery (Colored) in the War to Preserve the Union, 1861-1865
• New index to the civil and military lists of Rhode Island
• History of the Fifth Regiment of Rhode Island Heavy Artillery

South Carolina

• South Carolina Confederate Pension Applications 1919-1926 (includes digital images)
• Historical sketch of the South Carolina Military Academy

Tennessee

• Tennessee Confederate Pension Applications
• Tennessee Southern Claims Commission Index 1871-1873 Claims for property taken by U.S. military personnel for use in the Civil War.
• Tennessee Confederate Soldiers Home Applications
• Tennessee Civil War Veterans' Questionnaires
• Tennessee Confederate Physicians
• Tennessee Civil War Regimental Histories
• Report of the Adjutant General of the state of Tennessee : of the military forces of the state, from 1861 to 1866

Texas

• Texas Confederate Pensions
• Index to Texas Confederate Pension Applications, 1899 - 1975
• Texas Confederate Indigent Families, 1863 - 1865
• Texas Adjutant General Service Records 1836-1935

Vermont

• Vermont in the Civil War includes rosters of Vermont units
• Official military and naval records of Rutland, Vermont, 1861-1866
• Soldiers' record of the town of St. Johnsbury, Vermont in the War of the RebellionSoldiers' record of the town of St. Johnsbury, Vermont in the War of the RebellionSoldiers' record of the town of St. Johnsbury, Vermont in the War of the Rebellion
• History of the 8th Regiment Vermont Volunteers, 1861-1865

Virginia

• Library of Virginia Online Military Records includes...
  • Confederate Disability Applications
  • Confederate Pension Rolls for Veterans and Widows
  • Robert E. Lee Camp Confederate Soldiers' Home Applications
  • Index to Virginia Confederate Rosters
  • Electronic Card Index to the Confederate Navy
  • Index to Confederate Veteran Magazine
  • Virginia Military Dead Database
• Virginia Confederate Pension Rolls-Vets & Widows
• Virginia Confederate Disability Applications & Receipts for artificial limbs
• Civil War Era Burials at Alexandria National Cemetery
• 1890 Veterans Census for Northern Virginia
• Register of former cadets : Virginia Military Institute, Lexington, Virginia, 1939
• Pardons by the President : final report of the names of persons who lived in Alabama, Virginia, West Virginia, or Georgia

West Virginia

• West Virginia Union Militia in the Civil War
• Union and Confederate Soldiers and Sympathizers of Barbour County, West Virginia
• Pardons by the President : final report of the names of persons who lived in Alabama, Virginia, West Virginia, or Georgia

Wisconsin

• Roster of Wisconsin Volunteers, War of the Rebellion, 1861-1865
• A bibliography of Wisconsin's participation in the War Between the States
• A narrative of service with the 3rd Wisconsin Infantry
• History of the services of the Third Battery, Wisconsin Light Artillery
• The 36th Wisconsin Volunteer Infantry : 1st Brigade, 2d Division, 2d Army Corps, Army of the Potomac
• Wisconsin women in the War Between the States