When was the first census given in the US?
1790 United States Census
Although the Census was proved statistically factual, based on data collected, the records for several states (including: Delaware, Georgia, New Jersey, and Virginia) were lost sometime between 1790 and 1830.[3]  Almost one third of the original census data have been lost or destroyed since their original documentation.  These include some 1790 data from: Connecticut, Maine, Maryland, Massachusetts, New Hampshire, New York, North Carolina, Pennsylvania, Rhode Island, South Carolina, and Vermont; however, the validity and existence of most of these data can be confirmed in many secondary sources pertaining to the first census.[4]