Puerto Rican Population in Mercer County, NJ by City : 2025 Ranking & Insights

The Puerto Rican population in Mercer County, NJ is recorded at 19,660 residents, based on the latest U.S. Census estimates. Every city in Mercer County reports some Puerto Rican residents. With no unincorporated share evident in the totals, this points to a completely city-based population. The sections below explores how Puerto Rican residents are distributed in New Jersey and the U.S.

Top 5 cities with the largest Puerto Rican population in Mercer County

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  • 1
    Trenton
    Puerto Rican population in Trenton is 8,761
    9.74% of Trenton population is Puerto Rican
  • 2
    Hamilton township
    Puerto Rican population in Hamilton township is 5,784
    6.30% of Hamilton township population is Puerto Rican
  • 3
    Ewing township
    Puerto Rican population in Ewing township is 1,612
    4.51% of Ewing township population is Puerto Rican
  • 4
    East Windsor township
    Puerto Rican population in East Windsor township is 1,328
    4.45% of East Windsor township population is Puerto Rican
  • 5
    West Windsor township
    Puerto Rican population in West Windsor township is 578
    1.94% of West Windsor township population is Puerto Rican

Overview of Puerto Rican population in Mercer County

  • Population Count and Percentage: American Community Survey data shows Mercer County contains 19,660 Puerto Rican residents (5.1% of 383,286 total county population), ranking the jurisdiction at the 97th percentile nationally among counties and 47th percentile within New Jersey for Puerto Rican demographic concentrations across both absolute and proportional measures.
  • Comparison to State and National Averages: Census Bureau's ACS data documents Mercer County's Puerto Rican demographic representation of 5.1%, corresponding to New Jersey's state average while exceeding the national average of 1.8%, placing the county at state demographic averages while above national concentration levels.
  • Share of Total State Population: Official American Community Survey data documents Mercer County with 19,660 Puerto Rican residents, representing 4.1% of New Jersey's total Puerto Rican population of 474,542.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey shows Mercer County maintains 87.6 Puerto Ricans per square mile compared to New Jersey's average of 64.5, indicating higher demographic concentration relative to state averages.
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12 Cities in Mercer County Ranked by Puerto Rican Population

View Methodology
ACS data [1] confirm Puerto Rican populations in every incorporated city in the county, with the largest counts in Trenton, Hamilton township, Ewing township, and East Windsor township. The table below provides detailed figures, including total population, density measures, and demographic distributions, based on the current ACS data for all 12 incorporated cities included in this analysis*.
cities in Mercer County, NJ ranked by Puerto Rican population count
Rank by Puerto Rican Population
City
Puerto Rican Population
% of Total City Population
% of Total Mercer County Puerto Rican Population
5 Year Rank Trend
1 Trenton 8,761 9.74% 44.56%
2 Hamilton township 5,784 6.30% 29.42%
3 Ewing township 1,612 4.51% 8.20%
4 East Windsor township 1,328 4.45% 6.75%
5 West Windsor township 578 1.94% 2.94%
6 Princeton 488 1.60% 2.48%
7 Lawrence township 461 1.43% 2.34%
8 268 1.74% 1.36%
9 160 0.92% 0.81%
10 158 2.69% 0.80%
11 54 1.93% 0.27%
12 8 0.44% 0.04%
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Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in Mercer County, NJ by their Puerto Rican population, using the most recent ACS data available.

How the Census defines Puerto Rican population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Puerto Rican ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Puerto Rican alone, while others identify as Puerto Rican along with another race (such as Puerto Rican and German).
  • We’ve used the “Puerto Rican alone or in any combination” category unless noted otherwise, which gives a broader picture of the Puerto Rican population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Puerto Rican alone or in combination in city. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Puerto Rican .
  2. % of Total Mercer County Puerto Rican Population – This tells us how much of the entire U.S. Puerto Rican population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small Puerto Rican populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • City that don’t have any reported Puerto Rican population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Puerto Rican populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.