Most Foreign-Born Counties in America

US counties with the highest share of foreign-born residents. Foreign-born populations are concentrated near international gateway cities and agricultural regions with large immigrant workforces. Data from US Census Bureau ACS 2023.

Ranked by Foreign-Born Population. Click any location to see its full Census data profile. All figures are from the U.S. Census Bureau ACS 5-Year Estimates, 2023, so they are directly comparable across locations.

#	Location	Foreign-Born Population
351	Mendocino County, California	11.6%
352	Sawyer County, Wisconsin	11.6%
353	Marlboro County, South Carolina	11.6%
354	Lamb County, Texas	11.6%
355	Watonwan County, Minnesota	11.5%
356	Macomb County, Michigan	11.5%
357	Edmunds County, South Dakota	11.5%
358	Leake County, Mississippi	11.5%
359	Polk County, Florida	11.5%
360	Cass County, North Dakota	11.4%
361	Racine County, Wisconsin	11.4%
362	Guilford County, North Carolina	11.4%
363	Monroe County, Iowa	11.4%
364	Alachua County, Florida	11.4%
365	Dewey County, South Dakota	11.4%
366	Duchesne County, Utah	11.3%
367	Columbia County, Wisconsin	11.3%
368	Albany County, New York	11.3%
369	Benton County, Washington	11.2%
370	Cascade County, Montana	11.2%
371	Montgomery County, Pennsylvania	11.2%
372	Hunterdon County, New Jersey	11.2%
373	Ford County, Kansas	11.2%
374	Norman County, Minnesota	11.2%
375	Robertson County, Kentucky	11.2%
376	Cassia County, Idaho	11.1%
377	Los Alamos County, New Mexico	11.1%
378	Redwood County, Minnesota	11.1%
379	Union County, South Dakota	11.1%
380	Yuba County, California	11.0%
381	Denver County, Colorado	11.0%
382	Dickens County, Texas	11.0%
383	Fayette County, Kentucky	11.0%
384	Berkeley County, South Carolina	11.0%
385	San Diego County, California	11.0%
386	Montgomery County, Georgia	11.0%
387	Jessamine County, Kentucky	11.0%
388	Palo Alto County, Iowa	11.0%
389	Anchorage Municipality, Alaska	10.9%
390	Olmsted County, Minnesota	10.9%
391	Prowers County, Colorado	10.9%
392	Kaufman County, Texas	10.8%
393	Plymouth County, Massachusetts	10.8%
394	Burlington County, New Jersey	10.8%
395	Autauga County, Alabama	10.8%
396	Monona County, Iowa	10.8%
397	Floyd County, Texas	10.8%
398	Highlands County, Florida	10.8%
399	Carlton County, Minnesota	10.8%
400	Barnwell County, South Carolina	10.8%