Slavery among Native Americans in the United States includes slavery by Native Americans as well as slavery of Native Americans roughly within the present-day United States. Tribal territories and the slave trade ranged over present-day borders. Some Native American tribes held war captives as slaves prior to and during European colonization, some Native Americans were captured and sold by others into slavery to Europeans, and a small number of tribes, in the late eighteenth and nineteenth centuries, adopted the practice of holding slaves as chattel property and held increasing numbers of African-American slaves.
Pre-contact forms of slavery were generally distinct from the form of chattel slavery developed by Europeans in North America during the colonial period. European influence greatly changed slavery used by Native Americans. As they raided other tribes to capture slaves for sales to Europeans, they fell into destructive wars among themselves, and against Europeans.
Many Native American tribes practiced some form of slavery before the European introduction of African slavery into North America.
Native American groups often enslaved war captives whom they primarily used for small-scale labor. Others however, were used in ritual sacrifice, usually involving torture as part of religious rites, and these sometimes involved ritual cannibalism.
There were several differences between slavery as practiced in the pre-colonial era among Native Americans and slavery as practiced by Europeans after colonization. Whereas Europeans eventually came to look upon slaves of African descent as being racially inferior, Native Americans took slaves from other Native American groups, and therefore did not have the same racial ideology for their slavery. Native slaves could be looked down upon as ethnically inferior, however. Another difference was that Native Americans did not buy and sell captives in the pre-colonial era, although they sometimes exchanged enslaved individuals with other tribes in peace gestures or in exchange for redeeming their own members. In some cases, Native American slaves were allowed to live on the fringes of Native American society until they were slowly integrated into the tribe. The word "slave" may not accurately apply to such captive people.