1790 United States Census facts
The United States Census of 1790 was the first census done in the United States. It recorded the population of the United States as of Census Day, August 2, 1790. In the First Census, the population of the United States was 3,929,214.
Data was collected from all thirteen states (Connecticut, Delaware, Georgia, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, and Virginia), and districts and territories that would become Vermont, Kentucky, Tennessee, and Maine.
The records for many states were lost sometime between 1790 and 1830.
1790 United States Census Facts for Kids. Kiddle Encyclopedia.