How America Has Changed Since the First Census in 1790
1820: The U.S. has six new states
- U.S. resident population: 9,638,453
- Number of official states: 23
- Median age of population: 16.7
- Immigrants obtaining legal resident status: 8,385
- Biggest cities: New York, NY (Population: 123,706), Philadelphia, PA (63,802), Baltimore, MD (62,738)
The 1820 census featured six newly recognized states: Alabama, Illinois, Indiana, Louisiana, Maine, and Mississippi. The new states also indicated a rapidly swelling population that was fast-approaching 10 million.