Data / Rankings / Foreign-born population share / Counties in New Jersey

Counties in New Jersey by foreign-born share of the population

Hudson County had the highest foreign-born share of the population of 21 counties in 2021, at 42.9%. Salem County had the lowest, at 3.8%. The median was 13.2% and the figure for New Jersey was 22.9%. Source: the U.S. Census Bureau.

Highest42.9Hudson County
Lowest3.8Salem County
Median13.221 counties
New Jersey22.9History

All counties, 2021

CSVChart (SVG)

Hudson CountyHudson County: 42.9 %42.9Middlesex CountyMiddlesex County: 33.4 %33.4Passaic CountyPassaic County: 32.1 %32.1Bergen CountyBergen County: 30.9 %30.9Union CountyUnion County: 30.8 %30.8Essex CountyEssex County: 28.7 %28.7Somerset CountySomerset County: 26.5 %26.5Mercer CountyMercer County: 23.6 %23.6Morris CountyMorris County: 19.5 %19.5Atlantic CountyAtlantic County: 15.9 %15.9Monmouth CountyMonmouth County: 13.2 %13.2Camden CountyCamden County: 11.4 %11.4Cumberland CountyCumberland County: 10.5 %10.5Burlington CountyBurlington County: 10.3 %10.3Hunterdon CountyHunterdon County: 10.2 %10.2Warren CountyWarren County: 9.2 %9.2Sussex CountySussex County: 7.9 %7.9Ocean CountyOcean County: 7.8 %7.8Gloucester CountyGloucester County: 5.5 %5.5Cape May CountyCape May County: 4.9 %4.9Salem CountySalem County: 3.8 %3.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Hudson County42.9
2Middlesex County33.4
3Passaic County32.1
4Bergen County30.9
5Union County30.8
6Essex County28.7
7Somerset County26.5
8Mercer County23.6
9Morris County19.5
10Atlantic County15.9
11Monmouth County13.2
12Camden County11.4
13Cumberland County10.5
14Burlington County10.3
15Hunterdon County10.2
16Warren County9.2
17Sussex County7.9
18Ocean County7.8
19Gloucester County5.5
20Cape May County4.9
21Salem County3.8

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in New Jersey by foreign-born share of the population using official data, and cite the source.
rank_places {"indicator":"foreign_born_share","level":"province","within":"New Jersey","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=foreign_born_share&level=province&within=New%20Jersey&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest foreign-born share of the population?

Hudson County, with 42.9% in 2021, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Salem County, with 3.8% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in New Jersey: more rankings