The Library of Congress has produced some of the finest digital collections in the world, including:
- Civil War Maps
- The American Civil War Sesquicentennial Web Archive, commemorating the 150th anniversary of the American Civil War
- The Donald Benham Civil War Collection, consisting of correspondence, financial and legal records, military orders and records, speeches, and miscellaneous items comprising Civil War material amassed by collector Donald Benham
- Civil War Sheet Music Collection
- Band Music from the Civil War Era
- Civil War, which explores the faces, places and events of the U.S. Civil War through photographs, prints and drawings.
- Liljenquist Family Collection of Civil War Photographs,
- Civil War Soldier in the Wild Cat Regiment : Selections from the Tilton C. Reynolds Papers. This online presentation includes correspondence, photographs, and other materials dating between 1861 and 1865 documenting the Civil War experience of Captain Tilton C. Reynolds, a member of the 105th Regiment of Pennsylvania Volunteers.
- Washington During the Civil War: The Diary of Horatio Nelson Taft, 1861 to 1865. This collection represents three manuscript volumes that document daily life in Washington, D.C., through the eyes of U.S. Patent Office examiner Horatio Nelson Taft (1806-1888), including Taft's connection with Abraham Lincoln and his family. Of special interest is Taft's description of Lincoln's assassination, based on the accounts of his friends and his son, who was one of the attending physicians at Ford's Theatre the night Lincoln was shot, on April 14, 1865.
- Brady-Handy Collection, consisting of Civil War and post-Civil War portraits
- The Alfred Whital Stern Collection of Lincolniana features works by and about Abraham Lincoln (1809-1865) and his era; includes published and unpublished material on contemporary figures, slavery, the Civil War, and Reconstruction.