- Sons of Confederate Veterans (SCV) (30)
- Civil War Trust
 - Promotes appreciation and stewardship of historical, cultural, and environmental heritage through preservation of significant Civil War battlefields. - United Daughters of the Confederacy (4)
- Sons of Union Veterans of the Civil War (2)
- Military Order of the Loyal Legion of the United States (2)
- Central Virginia Battlefields Trust
- Preservation organisation dedicated to saving the battlefields in Central Virginia.
- Camp Nelson Restoration and Preservation Foundation
- Private nonprofit group of citizens working to preserve and interpret the Civil War site.
- Battle of Nashville Preservation Society and Civil War Roundtable
- Preserves the historic significance of the Nashville area in the Civil War years through an interpretive centre (ultimately a museum site).
- New Jersey Civil War Heritage Association (NJCWHA)
- Nonprofit group dedicated to the preservation and education of New Jersey's Civil War heritage.
- Camp Curtin Historical Society
- Dedicated to the preservation of the largest Federal camp of the Civil War.
- North Carolina Civil War Tourism Council
- Preserves North Carolina's Civil War era sites and museums through public and private partnerships.
- Sailor's Creek Reenactment and Preservation Committee
- Civil War Round Tables (2)
- Schuylkill County, PA Civil War Discussion Group
- Friends of Historic Lone Jack, The
- Preserving the history of the Lone Jack area, especially the Battle of Lone Jack, August 14-17, 1862. Features battle information, current preservation efforts, reenactment events, and more.
- Confederate States of America Heritage Preservation Association
- To protect, preserve and restore the historical significance of endangered symbols, customs and cultures of the colonial and confederate south.
- Fauquier County Civil War Round Table (FCWRT)
- Group of history enthusiasts dedicated to learning about and exchanging views on the U.S. Civil War.
- W. S. Hancock Society, The
- Dedicated to preserving the memory of Major General Winfield Scott Hancock-Historic preservation of his mausoleum and Gettysburg statue.
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