America’s Immigrants: County-level Data on the Foreign-born This resource offers a detailed breakdown of the immigrant population by state, county, and congressional district. Language(s):English Resource Type(s):Statistical Data Publisher/Producer: Sebastopol, CA: Grantmakers Concerned with Immigrants and Refugees (GCIR) Publication Date: n.d. Pages: var. Author(s):Grantmakers Concerned with Immigrants and Refugees (GCIR) Availability:http://maps.gcir.org/