The National Museum of African American History and Culture recently partnered with FamilySearch, the National Archives, the Afro-American Historical and Genealogical Society, and the California African American Museum to create a database of records of emancipated African Americans.
DiscoverFreedmen.org searches FamilySearch's collection of Freedmen's Bureau records. Established in 1865, the Freedmen's Bureau provided aid to recently emancipated slaves and poor whites in the South. The Freedmen's Bureau archives include marriage, census, land, court, school, and medical information from between 1865 and 1872. Because slaves were rarely recorded in pre-Civil War records, the Freedmen's Bureau is an excellent starting point for tracing enslaved ancestors.