Snapshot: Global Migration - Nearly 190 million people, about three percent of the world's population, lived outside their country of birth in 2005.  A look at the flow of people around the globe.  From the New York Times.

Economic Growth & Immigration: Bridging the Demographic Divide:  "The U.S. economy faces a demographic challenge to its future economic growth. Among the native-born population, fertility rates are falling, workers are growing older and better educated, and labor force participation rates are flattening. However, the economy continues to create a large number of less-skilled jobs that favor younger and less-educated workers. Immigration fills this gap between native labor supply and domestic labor demand."

A Map of Languages in the United States is intended for use by students, teachers, and anyone interested in learning about the linguistic and cultural composition of the United States. The MLA Language Map uses data from the 2000 United States census to display the locations and numbers of speakers of thirty languages and three groups of less commonly spoken languages in the United States

The Rise of New Immigrant Gateways a paper by the Brookings Institution offers an analysis of immigration to metropolitan areas during the 20th century.

State by State Census Data on the Foreign Born by the Migration Policy Institute, generates information on the size, composition, and socio-economic characteristics of the foreign-born population.

US Immigration Statistics by County by Grantmakers Concerned with Immigrants and Refugees.  The remarkable growth of immigrant populations across the United States in the last decade is particularly striking at the county level; provides information on counties with more than 12,500 immigrants.