These tables document the total population, the numbers of free people of color, and the numbers of slaves in the eight counties of Connecticut recorded in the U.S. censuses of 1790 and 1830. The U.S. Constitution requires that a national census be taken every ten years to apportion representation to the different states. Historians have found census data to be an extremely important resource for identifying population shifts and trends. The online United States Historical Census Data Browser, at http://fisher.lib.virginia.edu/collections/stats/histcensus/, allows the user to select specific census categories and allows users to find data at the county level, when that data is available. Census information is available for all the U.S. censuses from 1790 to 1960.