The Census is a complete count of all persons living in the United States mandated by the U.S. Constitution. The population is counted every 10 years and the results are used to allocate Congressional seats, electoral votes and government program funding. The most recent census was held in 2020.
The Maryland State Data Center is designated by the U.S. Census Bureau as the repository and service center for census data pertaining to the state.
In addition to supporting current data, the Maryland State Data Center offers resources on
Historical Census data—typically drawn from reports and tabulations produced around the time each decennial census was released. These historical resources provide insight into past population trends, demographic shifts, and socioeconomic patterns across Maryland. While formats and data availability vary by census year, these materials can be useful for research, planning, and long-term analysis.
For more recent historical data, digital data and reports are available. Resources available vary by Census. You can reach pages for History Census products by clicking on any of the links below.
