databases of statistical information

Immigration

U.S. Department of Homeland Security

Immigration Statistics

The main U.S. government source of statisticial data on immigration

U.S. Census Bureau

International Migration

The U.S. Census Bureau site with data on immigration to and emigration from the United States.

Migration Policy Institute

Immigration Data Hub

The Migration Policy Institute provides access to their statistics, facts and maps on migratio and immigration in the U.S. and abroad, with databases that are searchable by state.