Happy Birthday Census!
August 2nd marks the 220th birthday of the U.S. Census. August 2nd, 1790, was the date the first count of all U.S. citizens began, which is now a mandatory decennial count as required by Title 13 of the U.S. Code.
The country has changed tremendously since the first census In 1790. Then the U.S. had only twelve states, had a population of 3.2 million (excluding slaves), and the average family size was 6 persons. According to the Census Population Clock, our current population is over 309 million!
The U.S. Census Bureau has put hundreds of scanned pages from the first census online. You can read the original Heads of Families reports for each state, which list the names of heads of household by county, and includes how many males are over 16, under 16, who are "all other free persons" in the household, and how many slaves each household owned.