Work with interactive mapping tools from across the Census Bureau.
Read briefs and reports from Census Bureau experts.
Watch Census Bureau vignettes, testimonials, and video files.
Read research analyses from Census Bureau experts.
Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
Find a multitude of DVDs, CDs and publications in print by topic.
These external sites provide more data.
Download extraction tools to help you get the in-depth data you need.
Explore Census data with interactive visualizations covering a broad range of topics.
Information about the U.S. Census Bureau.
Information about what we do at the U.S. Census Bureau.
Learn about other opportunities to collaborate with us.
Explore the rich historical background of an organization with roots almost as old as the nation.
Explore prospective positions available at the U.S. Census Bureau.
Information about the current field vacancies available at the U.S. Census Bureau Regional Offices.
Discover the latest in Census Bureau data releases, reports, and events.
The Census Bureau's Director writes on how we measure America's people, places and economy.
Find interesting and quirky statistics regarding national celebrations and major events.
Find media toolkits, advisories, and all the latest Census news.
See what's coming up in releases and reports.
The 1870 census commenced on June 1, 1870, and was taken under the provisions of the Census Act of May 23, 1850. The Secretary of Interior appointed General Francis A. Walker Superintendent of the Ninth Census on February 7, 1870.
The 1870 census marked the first enumeration following the end of slavery and, therefore, counted all inhabitants of the United States on a single population schedule. The 1870 enumeration was completed on August 23, 1871, and a portion of the data was processed using a machine invented by Charles W. Seaton.
At its conclusion, the 1870 census reported the U.S. resident population as 38,558,371, a 26.6 percent increase from 1860.