Demographics of Nantucket County, Massachusetts

Nantucket County, Massachusetts had 14,758 people on July 1, 2025, by the Census Bureau’s estimate: +518 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Nantucket County, in four figures

14,758
Population: July 1, 2025, Vintage 2025 estimate.; +3.6%
Change since July 2020: +518 people.; 42.4 ±1.6
Median age: ACS 2020–⁠2024.; $139,688 ±$16,786
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Nantucket County, Massachusetts's population grew 3.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Nantucket County, Massachusetts's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Nantucket County, Massachusetts's population grew 3.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Nantucket County, Massachusetts's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	14,240	100.0	100.0
2021	14,518	102.0	100.2
2022	14,502	101.8	100.7
2023	14,562	102.3	101.6
2024	14,713	103.3	102.5
2025	14,758	103.6	103.1

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Population of Nantucket County, Massachusetts on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	14,240	−11	+9	0	−24
2021	14,518	+278	+72	+15	+192
2022	14,502	−16	+62	+104	−178
2023	14,562	+60	+77	+113	−131
2024	14,713	+151	+73	+136	−59
2025	14,758	+45	+72	+57	−87

Age, 2020–2024

The median age is 42.4 ±1.6: for men 42.5 ±2.1 and for women 42.2 ±3.9. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Nantucket County by age, ACS 2020–2024
Age	People	Share	Massachusetts	United States
Under 5	682 ±181	4.7% ±1.3	5.0% ±<0.1	5.6% ±<0.1
5 to 17	2,293 ±314	15.8% ±2.2	14.4% ±0.1	16.3% ±<0.1
18 to 24	979 ±359	6.8% ±2.5	9.8% ±0.1	9.1% ±<0.1
25 to 44	3,949 ±528	27.3% ±3.6	27.1% ±0.1	26.9% ±<0.1
45 to 64	4,253 ±538	29.4% ±3.7	25.9% ±0.1	24.8% ±<0.1
65 and over	2,327 ±254	16.1% ±1.8	17.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $139,688 ±$16,786, and income per person $77,014 ±$8,100, in 2024 dollars. The median is $103,960 ±$527 in Massachusetts and $80,734 ±$166 in the United States.

Households by income

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Households in Nantucket County by income, ACS 2020–2024
Household income	Households	Share	Massachusetts	United States
Under $25,000	91 to 419	1.8% to 8.0%	13.2% ±0.2	14.6% ±<0.1
$25,000 to $49,999	299 ±104	5.7% ±1.9	12.5% ±0.2	16.7% ±<0.1
$50,000 to $74,999	969 ±371	18.5% ±6.9	12.0% ±0.2	15.5% ±<0.1
$75,000 to $99,999	410 ±178	7.8% ±3.3	10.7% ±0.2	12.6% ±<0.1
$100,000 to $149,999	850 ±241	16.2% ±4.5	17.5% ±0.2	17.5% ±<0.1
$150,000 to $199,999	519 ±158	9.9% ±2.9	11.9% ±0.1	9.6% ±<0.1
$200,000 or more	1,950 ±360	37.1% ±6.4	22.3% ±0.2	13.4% ±0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Nantucket County by age, ACS 2020–2024
Age	Below poverty	Rate	Massachusetts	United States
All ages	451 ±220	3.2% ±1.5	10.0% ±0.1	12.5% ±0.1
Under 18	0 to 78	0% to 2.7%	11.7% ±0.3	16.1% ±0.1
18 to 59	77 to 457	0.9% to 5.6%	9.3% ±0.2	11.6% ±0.1
60 and over	52 to 268	1.6% to 8.3%	10.4% ±0.2	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Nantucket County, ACS 2020–2024
Measure	Nantucket County	Massachusetts	United States
Housing units	12,594 ±20	3,030,406 ±453	143,775,355 ±10,234
Occupied	41.7% ±2.9	91.9% ±0.2	89.9% ±0.1
Vacant	58.3% ±2.9	8.1% ±0.2	10.1% ±0.1
Owner occupied	71.8% ±5.3	62.5% ±0.3	65.2% ±0.3
Renter occupied	28.2% ±6.6	37.5% ±0.2	34.8% ±0.1
Median home value	$1,593,800 ±$149,009	$562,100 ±$2,169	$332,700 ±$236
Median gross rent	$2,213 ±$628	$1,762 ±$9	$1,413 ±$2
Median year built	1984 ±2	1964 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Nantucket County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Massachusetts	United States
Hispanic or Latino	2,467 ±0	17.0% ±<0.1	13.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,879 ±129	68.2% ±0.9	66.6% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	1,361 ±245	9.4% ±1.7	6.4% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	251 ±36	1.7% ±0.2	7.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 21	0% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 21	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	27 to 227	0.2% to 1.6%	1.2% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	134 to 646	0.9% to 4.5%	5.1% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Nantucket County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Massachusetts	United States
Born in the state	6,762 ±643	46.7% ±4.4	58.7% ±0.2	57.3% ±<0.1
Born in another state	4,985 ±605	34.4% ±4.2	20.3% ±0.2	26.9% ±<0.1
Born a citizen outside the states	162 to 730	1.1% to 5.0%	2.9% ±0.1	1.7% ±<0.1
Born abroad	2,290 ±641	15.8% ±4.4	18.0% ±0.1	14.1% ±<0.1
Naturalized citizens	1,219 ±386	8.4% ±2.7	9.7% ±0.1	7.4% ±<0.1
Not citizens	454 to 1,688	3.1% to 11.7%	8.3% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Nantucket County among the counties of Massachusetts

14th of 14 by population, July 2025. Every one is listed on the Massachusetts page.

Counties of Massachusetts near Nantucket County in population, July 2025
County	July 2025	Change since 2020
Barnstable County	233,539	+2.4%
Hampshire County	164,065	+10.4%
Berkshire County	128,224	−1.2%
Franklin County	70,698	−0.3%
Dukes County	21,219	+3.1%
Nantucket County	14,758	+3.6%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026