From Ancestry.com
The 1810 census was begun on 6 August 1810. The count was due within nine months, but the due date was extended by law to ten months.
Questions Asked in the 1810 Census..Name of family head; number of free white males and females in age categories: 0 to 10, 10 to 16, 16 to 26, 26 to 45, 45 and older; number of other free persons except Indians not taxed; number of slaves; and town or district and county of residence.
Free men “of color” are named as heads of household. Slaves appear in age groupings by name of owner. By combining those age groupings with probate inventories and tax list data, it is sometimes possible to determine names of other family members and the birth order of those individuals. Manufacturing schedules are scattered among the 1810 population schedules.
16 areas were enumerated: Connecticut, Delaware, Kentucky, Louisiana, Maine, Maryland, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont and Virginia