The 1840 United States Census was the sixth national census conducted in the United States, taking place on June 1, 1840. It aimed to count the population and gather demographic information, including age, sex, and race. This census was notable for its focus on free and enslaved individuals, as well as the inclusion of data on various social and economic factors, such as the number of veterans and the presence of disabilities. The total population recorded in the 1840 census was approximately 17 million people. The results were used to allocate congressional representation and inform government policies. This census also marked the first time that information about manufacturing and industry was collected, reflecting the growing importance of economic data in understanding the nation’s development.