Racial diversity in New Hampshire is a mixed bag.
There are parts of New Hampshire where there’s a high level of diversity. But where will you find the most diverse places in New Hampshire?
To answer that question, we went to the US Census data. Using Saturday Night Science, we measured the Gini coefficient for all 13 cities in New Hampshire to rank them from most to least diverse.
Table Of Contents: Top Ten | Methodology | Summary | Table
Here are the 10 most diverse places in New Hampshire for 2025:
- Nashua
- Manchester
- Somersworth
- Lebanon
- Concord
- Dover
- Berlin
- Portsmouth
- Claremont
- Laconia
So what city is the most diverse in New Hampshire? According to the most Census data, Nashua took the number one over all spot for diversity in New Hampshire.
Read on below to see how we crunched the numbers and how your town ranked. To see where New Hampshire ranked as a state, we have a ranking of the most diverse states in Ameria.
For more New Hampshire reading:
The 10 Most Diverse Places In New Hampshire For 2025
/10
Population: 91,131
HHI: 5,376
% White: 71.4%
% African American: 2.4%
% Hispanic: 14.0%
% Asian: 7.6%
More on Nashua: Data
/10
Population: 115,415
HHI: 5,538
% White: 72.8%
% African American: 4.7%
% Hispanic: 13.4%
% Asian: 4.6%
More on Manchester: Data
/10
Population: 12,060
HHI: 6,884
% White: 82.5%
% African American: 2.6%
% Hispanic: 5.8%
% Asian: 2.9%
More on Somersworth:
/10
Population: 14,759
HHI: 7,303
% White: 85.0%
% African American: 0.6%
% Hispanic: 2.3%
% Asian: 7.4%
More on Lebanon: Data
/10
Population: 44,219
HHI: 7,378
% White: 85.6%
% African American: 3.6%
% Hispanic: 3.8%
% Asian: 3.2%
More on Concord: Data
/10
Population: 33,070
HHI: 7,409
% White: 85.8%
% African American: 1.2%
% Hispanic: 3.7%
% Asian: 3.3%
More on Dover:
/10
Population: 9,473
HHI: 7,449
% White: 85.9%
% African American: 4.5%
% Hispanic: 5.2%
% Asian: 0.2%
More on Berlin: Data
/10
Population: 22,332
HHI: 7,555
% White: 86.7%
% African American: 0.7%
% Hispanic: 3.5%
% Asian: 3.9%
More on Portsmouth: Data
/10
Population: 13,054
HHI: 7,645
% White: 87.1%
% African American: 1.3%
% Hispanic: 5.1%
% Asian: 0.4%
More on Claremont: Data
/10
Population: 16,982
HHI: 8,202
% White: 90.4%
% African American: 0.0%
% Hispanic: 3.2%
% Asian: 1.5%
More on Laconia: Data
Methodology: How we determined the most diverse cities in New Hampshire for 2025
We still believe in the accuracy of data — especially from the Census — and Saturday Night Science. So that’s where we went to get the race breakdown across New Hampshire.
That leads us to the Census’s most recently available data, the 2019-2023 American Community Survey data from the US Census.
Specifically, we looked at table B03002: HISPANIC OR LATINO ORIGIN BY RACE. Here are the category names as defined by the Census:
- White alone*
- Black or African American alone*
- American Indian and Alaska Native alone*
- Asian alone*
- Native Hawaiian and Other Pacific Islander alone*
- Some other race alone*
- Two or more races*
- Hispanic or Latino
We limited our analysis to non-CDPs with a population greater than 8,000 people. That left us with 13 cities.
We then calculated the HHI for each city by finding the racial breakdown of a city in percent terms, squaring them, and then adding the squares together. This left us with scores ranging from 5,376 (Nashua) to 8,900 (Franklin).
Finally, we ranked each city based on the HHI, with a lower score being more diverse than a high score. Nashua took the distinction of being the most diverse, while Franklin was the least diverse city.
We updated this article for 2025. This report is our tenth time ranking the most diverse places in New Hampshire.
Summary: Diversity Across New Hampshire
If you’re looking for a scientific breakdown of diversity across New Hampshire, this is an accurate list.
The most diverse cities in New Hampshire are Nashua, Manchester, Somersworth, Lebanon, Concord, Dover, Berlin, Portsmouth, Claremont, and Laconia.
If you’re curious enough, here are the least diverse places in New Hampshire:
- Franklin
- Rochester
- Keene
For more New Hampshire reading, check out:
- Best Places To Live In New Hampshire
- Cheapest Places To Live In New Hampshire
- Most Dangerous Cities In New Hampshire
- Best Places To Raise A Family In New Hampshire
- Safest Places In New Hampshire
- Worst Places To Live In New Hampshire
Race By City In New Hampshire For 2025
| Rank | City | Population | HHI | % White | % Black | % Hispanic | % Asian |
|---|---|---|---|---|---|---|---|
| 1 | Nashua, NH | 91,131 | 5,376 | 71.4% | 2.4% | 14.0% | 7.6% |
| 2 | Manchester, NH | 115,415 | 5,538 | 72.8% | 4.7% | 13.4% | 4.6% |
| 3 | Somersworth, NH | 12,060 | 6,884 | 82.5% | 2.6% | 5.8% | 2.9% |
| 4 | Lebanon, NH | 14,759 | 7,303 | 85.0% | 0.6% | 2.3% | 7.4% |
| 5 | Concord, NH | 44,219 | 7,378 | 85.6% | 3.6% | 3.8% | 3.2% |
| 6 | Dover, NH | 33,070 | 7,409 | 85.8% | 1.2% | 3.7% | 3.3% |
| 7 | Berlin, NH | 9,473 | 7,449 | 85.9% | 4.5% | 5.2% | 0.2% |
| 8 | Portsmouth, NH | 22,332 | 7,555 | 86.7% | 0.7% | 3.5% | 3.9% |
| 9 | Claremont, NH | 13,054 | 7,645 | 87.1% | 1.3% | 5.1% | 0.4% |
| 10 | Laconia, NH | 16,982 | 8,202 | 90.4% | 0.0% | 3.2% | 1.5% |
| 11 | Keene, NH | 22,923 | 8,425 | 91.7% | 1.5% | 2.3% | 0.5% |
| 12 | Rochester, NH | 32,866 | 8,529 | 92.3% | 0.8% | 1.7% | 1.8% |
| 13 | Franklin, NH | 8,757 | 8,900 | 94.2% | 0.3% | 0.0% | 0.2% |