Migration Policy Institute
https://www.migrationpolicy.org/about/about-migration-policy-institute
Mission: The nonpartisan Migration Policy Institute seeks to improve immigration and integration policies through authoritative research and analysis, opportunities for learning and dialogue, and the development of new ideas to address complex policy questions.
Maps of Immigrants in the United States. Use our interactive maps to learn where immigrant populations are concentrated in the United States by country or region of birth, or explore settlement patterns and concentration of various immigrant populations in the United States. To look at a map, click on its title or thumbnail. https://www.migrationpolicy.org/programs/data-hub/maps-foreign-born-united-states
U.S. Immigrant Population by State and County, https://www.migrationpolicy.org/programs/data-hub/charts/us-immigrant-population-state-and-county
U.S. Immigrant Population by Metropolitan Area, https://www.migrationpolicy.org/programs/data-hub/charts/us-immigrant-population-metropolitan-area