Answer: Southern States
Explanation: According to the 1790 census, most enslaved people in the United States lived in the Southern states. At the time, slavery was an integral part of the American economy, and the Southern states were heavily reliant on enslaved labor to work their large cotton, rice, and tobacco plantations.
In 1790, the Southern states of Virginia, Maryland, North Carolina, South Carolina, and Georgia together accounted for over 70% of the total enslaved population in the United States. Other Southern states, such as Delaware, Kentucky, and Tennessee, also had significant populations of enslaved people.