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
1	Doña Ana County, New Mexico	85.2%
2	Merrimack County, New Hampshire	74.1%
3	Rockingham County, New Hampshire	59.3%
4	Grafton County, New Hampshire	50.8%
5	Franklin Parish, Louisiana	49.0%
6	Kodiak Island Borough, Alaska	45.2%
7	Logan County, Kansas	44.1%
8	Aleutians West Census Area, Alaska	44.1%
9	Silver Bow County, Montana	43.4%
10	Dawson County, Montana	43.3%
11	Sullivan County, New Hampshire	42.7%
12	Hudson County, New Jersey	42.6%
13	Pratt County, Kansas	42.3%
14	De Soto Parish, Louisiana	38.9%
15	Kenedy County, Texas	38.5%
16	Scotland County, North Carolina	38.1%
17	Sweet Grass County, Montana	37.7%
18	Allen Parish, Louisiana	37.0%
19	Grant Parish, Louisiana	36.7%
20	Manassas Park city, Virginia	36.6%
21	Plymouth County, Iowa	36.4%
22	Broward County, Florida	36.2%
23	East Baton Rouge Parish, Louisiana	35.8%
24	Miami County, Kansas	35.3%
25	Matanuska-Susitna Borough, Alaska	34.8%
26	Middlesex County, New Jersey	34.7%
27	Scott County, Kansas	34.6%
28	San Francisco County, California	34.2%
29	Santa Cruz County, Arizona	34.1%
30	Louisa County, Iowa	33.7%
31	Montgomery County, Maryland	33.4%
32	Blaine County, Montana	33.4%
33	Lyon County, Kansas	33.2%
34	Passaic County, New Jersey	32.8%
35	Union County, New Jersey	32.8%
36	Aleutians East Borough, Alaska	32.4%
37	Phillips County, Montana	32.4%
38	Manassas city, Virginia	31.8%
39	Bergen County, New Jersey	31.4%
40	Coleman County, Texas	31.3%
41	Imperial County, California	30.8%
42	Rapides Parish, Louisiana	30.8%
43	Fairfax County, Virginia	30.8%
44	Mitchell County, Texas	30.8%
45	Lake County, Montana	30.6%
46	Dimmit County, Texas	30.6%
47	Fairfax city, Virginia	30.5%
48	Lincoln County, Kansas	30.5%
49	Kenai Peninsula Borough, Alaska	30.4%
50	Crockett County, Texas	29.7%