From Ancestry.com
The 1800 census was begun on 4 August 1800. The count was to be completed within nine months. There are 13 areas enumerated Connecticut, Delaware, District of Columbia, Maine, Maryland, Massachusettes, New Hampshire, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, Vermont.
Questions Asked in the 1800 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.
Other Significant Facts about the 1800 Census
Most 1800 census entries are arranged in the order of visitation, but some have been rearranged to appear in alphabetical order by initial letter of the surname.
Research Tips for the 1800 Census
The 1800 census records are useful in identifying the locality to be searched for other types of records for a named individual. The 1800 census will, in most cases, help distinguish the target family from others of the same name; help to determine family size; locate possible relatives with the same name; identify immediate neighbors who may be related; identify slaveholders; and spot spelling variations of surnames. Free men “of color” are listed as heads of household by name. 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.