The 2020 United States census was the 24th decennial United States census. Census Day, the reference day used for the census, was April 1, 2020. Other than a pilot study during the 2000 census, this was the first U.S. census to offer options to respond online or by phone, in addition to the paper response form used for previous censuses.
The census was taken during the COVID-19 pandemic, which affected its administration. The census recorded a resident population of 331,449,281 in the 50 states and the national capital of Washington, D.C., reflecting an increase of 7.4 percent, or 22,703,743, over that of 2010. The growth rate was the second-lowest ever recorded, and the net increase was the sixth highest in history. This was the first census where the 10 most-populous states each surpassed 10 million residents, and the first census where the 10 most-populous cities each surpassed 1 million residents.
As required by the United States Constitution, the U.S. ce