
The Grand Army of the Republic (GAR) was a fraternal organization composed of veterans of the Union Army, Union Navy, and the Marines who served in the American Civil War. It was founded in 1866 in Springfield, Illinois, and grew to include hundreds of "posts" across the nation. It was dissolved in 1956 at the death of its last member, Albert Woolson (1850–1956) of Duluth, Minnesota.

The Military Order of the Stars and Bars (MOSB) is a 501(c)(3) charitable organization in the United States based in Woodbridge, Virginia. It is a lineage society founded in 1938 for men who are descended from military officers or political leaders in the Confederate States of America (CSA).

The National Association of Army Nurses of the Civil War or National Army Nurses was an organization of former nurses who served in the American Civil War. It was primarily a social organization, but it also advocated for, and helped to secure, recognition and benefits for nurses who had served in the war.
The Reunion Society of Vermont Officers was an organization of American Civil War veterans.

The Sons of Confederate Veterans (SCV) is an American neo-confederate nonprofit and charitable organization of male blood-descendants of Confederate veterans engaging in the commemoration of Confederate Civil War soldiers, the funding of monuments to them, and the promotion of the pseudo-historical Lost Cause ideology. The SCV was founded on July 1, 1896, in Richmond, Virginia by R. E. Lee Camp, No. 1 of the Confederate Veterans. Its headquarters is situated at the Elm Springs in Columbia, Tennessee.

Sons of Union Veterans of the Civil War (SUVCW) is an American congressionally chartered fraternal organization that carries out activities to preserve the history and legacy of the United States Armed Forces veterans who fought during the Civil War. It is the legal successor to the Grand Army of the Republic, the large and influential grouping of Union Army veterans that existed in the decades following the Civil War. Most SUVCW activities occur at the "Camp", or local community, level. In turn, Camps are grouped into state and/or regional structures called "Departments". The National organization, with headquarters at the National Civil War Museum in Harrisburg, Pennsylvania, meets annually in a National Encampment that is attended by SUVCW members, known as "Brothers", from all Camps and Departments.

The United Confederate Veterans was an American Civil War veterans' organization headquartered in New Orleans, Louisiana. It was organized on June 10, 1889, by ex-soldiers and sailors of the Confederate States as a merger between the Louisiana Division of the Veteran Confederate States Cavalry Association; N. B. Forrest Camp of Chattanooga, Tennessee; Tennessee Division of the Veteran Confederate States Cavalry Association; Tennessee Division of Confederate Soldiers; Benevolent Association of Confederate Veterans of Shreveport, Louisiana; Confederate Association of Iberville Parish, Louisiana; Eighteenth Louisiana; Adams County (Mississippi) Veterans' Association; Louisiana Division of the Army of Tennessee; and Louisiana Division of the Army of Northern Virginia.

The United Daughters of the Confederacy (UDC) is an American hereditary association of women engaging in the commemoration of Confederate Civil War soldiers, the funding of monuments to them, and the promotion of the pseudo-historical Lost Cause ideology and white supremacy. It was established in 1894 in Nashville, Tennessee. In the early 1900s the organization often applauded the Ku Klux Klan and funded the building of a monument to the Klan in 1926. The UDC has been labeled as neo-Confederate by the Southern Poverty Law Center.