U.S. Counties with the Highest Immigrant Concentration

Deciding where in the United States to start your life involves far more than choosing between the East and West coasts. Where established immigrant communities exist, how they are distributed across states and counties, and how much each region charges in income, sales, and property taxes — all of this reshapes the financial and emotional equation of relocating. Those who overlook these three factors end up paying more and taking longer to settle in.

According to the U.S. Census Bureau’s 2023 American Community Survey, the United States is home to approximately 47.8 million foreign-born individuals, representing 14.3% of the total population — the highest share since the late nineteenth century. But this population is not evenly distributed: it clusters in dense urban corridors, specific agricultural regions, and technology hubs. Understanding this map is the first step in any serious mobility plan.

Why Immigrants Concentrate in Certain Counties

The choice of destination within the United States is rarely random. Established communities function as informal infrastructure: they offer housing referrals, co-ethnic labor markets, schools with a track record of serving ELL (English Language Learners) students, doctors who speak the home language, and support networks in times of crisis. This social capital accelerates adaptation and reduces the psychological cost of displacement.

The second factor is the local economic structure. Counties with a strong presence in intensive agriculture, hospitality, construction, food processing, and cutting-edge technology absorb foreign workers at different rates. That is why the demographic map overlaps with the sectoral map: Silicon Valley attracts skilled professionals from India and China; California’s Central Valley concentrates Mexican agricultural workers; Miami consolidates flows from Cuba, Venezuela, and Colombia.

The third factor is local policy. Sanctuary cities, state-level integration assistance programs, driver’s license access for undocumented immigrants, and police department practices all influence the decision to settle. States such as California, New York, Illinois, and New Jersey consistently rank at the top of the list due to this combination of structural factors.

Counties with the Highest Share of Immigrants

Based on American Community Survey estimates, the counties where the foreign-born population represents the largest share of the total are:

• Miami-Dade, Florida: approximately 54% of the population is foreign-born, with a strong predominance of Cubans, Colombians, Venezuelans, Haitians, and Nicaraguans.
• Queens, New York: around 47%, featuring a mosaic of Hispanic, South Asian, and Eastern European communities.
• Hudson, New Jersey: roughly 42%, anchored by Cuban, Dominican, and Indian communities.
• Santa Clara, California: approximately 41%, with a strong presence of Indian, Chinese, Vietnamese, and Mexican professionals drawn by Silicon Valley.
• Broward, Florida: around 36%, with Caribbean and South American communities.
• San Mateo, California: roughly 35%, with a profile similar to Santa Clara.
• Kings (Brooklyn), New York: approximately 35%, with an extremely diverse range of origins.

There are also rural and low-population counties with high percentages driven by specific economic factors, such as Aleutians West in Alaska, tied to the fishing and port logistics industry.

Fast-Growing Counties

Outside the traditional centers, several counties have been rapidly emerging as immigrant destinations:

• Harris County, Texas (Houston): an energy and medical hub with growing flows of Mexicans, Salvadorans, Vietnamese, and Nigerians.
• Gwinnett County, Georgia: an Atlanta suburb with an expanding Korean, Indian, and Latin American community.
• Clark County, Nevada (Las Vegas): hospitality, construction, and logistics attracting Latino and Filipino workers.
• King County, Washington (Seattle): technology and biotechnology drawing skilled Asian professionals.
• Mecklenburg County, North Carolina: Charlotte has established itself as a growing destination for Latino and African immigrants.

Taxation: The Component That Changes the Real Cost of Living

The effect of taxes on an immigrant’s monthly budget is frequently underestimated. The United States levies taxes at three levels — federal, state, and local — and the variation between states can amount to thousands of dollars per year for the same nominal income.

State Income Tax

States like California (a progressive rate that can reach 13.3%) and New York (up to 10.9%) impose a heavy burden on high earners. Florida, Texas, Nevada, Tennessee, New Hampshire, South Dakota, Wyoming, Alaska, and Washington, on the other hand, charge no state income tax. For a skilled professional earning a six-figure salary, moving from Santa Clara County to an equivalent county in Austin can represent significant annual savings.

Sales Tax

Sales tax combines state and local rates. Tennessee, Arkansas, Louisiana, and Washington are among the states with the highest combined sales tax, frequently exceeding 9%. Oregon, Montana, New Hampshire, and Delaware charge no state sales tax, which benefits consumers on higher-value purchases.

Property Tax

Property tax is levied by the county and can vary dramatically. New Jersey leads the country in average effective rates, with values that can exceed 2% of market value per year. Texas, Illinois, New Hampshire, and Connecticut also rank among the most expensive. At the other extreme, Hawaii, Alabama, and Colorado operate with much lower effective rates. It is worth noting that states with no income tax tend to offset this with higher property taxes.

How Immigrant Profiles Vary Across Counties

The cultural, professional, and linguistic capital of each region reflects the history of migration flows. In Miami-Dade, most immigrants come from Latin America, with a strong Cuban, Venezuelan, Colombian, and Haitian concentration — Spanish is a working language in many sectors. Queens is one of the most linguistically diverse places on the planet, with more than 130 languages spoken at home according to the Census. Santa Clara and San Mateo are dominated by skilled Asian professionals, especially Indians and Chinese in the technology sector. Harris County combines a strong Mexican presence with expanding Central American and African communities.

This profile matters when evaluating day-to-day practicalities. Access to stores carrying products from the home country, schools with bilingual programs, doctors who speak a given language, religious networks, and specialized nonprofits — all of this reduces daily friction. For families with children, the presence of an established community can be a decisive factor in the quality of school adjustment.

How Immigration Status Affects Your Tax Obligations

Tax obligations vary by status. Lawful permanent residents (Green Card holders) and naturalized citizens are taxed on worldwide income, just like any U.S.-born citizen. Foreign nationals on nonimmigrant visas may be treated as residents for tax purposes once they meet the substantial presence test — generally 183 days in the current year combined with presence in prior years.

Undocumented workers frequently pay sales tax and property tax (the latter embedded in rent), and many pay federal income tax using an ITIN — Individual Taxpayer Identification Number. This filing history can be relevant in future regularization proceedings, although the IRS operates independently from USCIS.

Combining the Three Factors to Decide Where to Live

The best exercise before relocating is to build a spreadsheet comparing the following for each candidate county:

• Average rent or mortgage payment for the desired housing type
• State income tax applicable to the expected salary
• Combined sales tax in the spending categories that dominate the budget
• Projected property tax if there is interest in buying a home
• Access to the job market in the immigrant’s professional sector
• Size and maturity of the community from the home country
• Quality of district public schools for families with children

This exercise reveals that two counties with identical nominal salaries can produce very different purchasing power. A five-percentage-point difference between state rates, combined with sales tax variation and the property tax impact on rent, translates into thousands of dollars over each year of residency.

Understanding both the demographic map and the tax map before choosing a destination is what separates those who arrive in the United States with a plan from those who discover the real cost only when they receive their first American bank statement.

Victoria Harper

Editor-in-Chief

Meet the author

Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.