Center for Immigration Studies
Independent, non-partisan, non-profit research organization devoted to research and policy analysis of the economic, social, demographic, fiscal, and other impacts of immigration on the United States
International Organization for Migration
inter-government group that works with governments and agencies around the world. Makes available a number of reports and documents, as well as news updates.
Migration Information Source
Consolidates information from a number of reliable sources. Offers both a rich amount of data, include comparative.
Mexican Migration Project (Princeton University & University of Guadalajara)
Research that studies and documents the process of Mexican migration to the U.S. Offers both a raw data source and reports.