Nantucket County, Massachusetts Demographics 2026

Name: Nantucket County, Massachusetts Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Nantucket County, Massachusetts has a population of 14,483, the 14th most populous county in Massachusetts. The median household income is $139,688 and the median home value is $1,593,800. The poverty rate is 3.2%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Nantucket County Quick Facts

Population 14,483

Median Household Income $139,688

Median Home Value $1,593,800

Poverty Rate 3.2%

Unemployment Rate 4.3%

Median Age 42.4 years

Homeownership Rate 71.8%

Affordability Ratio 11.4x

Bachelor's Degree+ 56.3%

High School Graduation 93.2%

Cities/Places 3

Population 14,483 14th of 14

Median Income $139,688 34% higher than state

Poverty Rate 3.2%

Unemployment 4.3%

How Nantucket County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	14,299	14,483	+1.3%
Median household income	$119,750	$139,688	+16.6%
Median home value	$1,387,000	$1,593,800	+14.9%

Median Household Income

Nantucket

$139,688

$103,960

National

$80,734

Median Home Value

Nantucket

$1,593,800

$562,100

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 4.9%

$25K-$50K 5.7%

$50K-$100K 26.3%

$100K+ 63.2%

Detailed income brackets

Under $10K

2.1%

$10K-$15K

1.0%

$15K-$20K

0.9%

$20K-$25K

0.7%

$25K-$30K

1.0%

$30K-$35K

0.3%

$35K-$40K

1.1%

$40K-$45K

2.4%

$45K-$50K

0.8%

$50K-$60K

3.2%

$60K-$75K

15.2%

$75K-$100K

7.8%

$100K-$125K

6.2%

$125K-$150K

10.0%

$150K-$200K

9.9%

$200K+

37.1%

Employment

4.3% Unemployment Rate State: 5.1%|National: 5.2%

71.8% Labor Force Participation

Housing Overview

Owner 71.8%

Renter 28.2%

Affordability Index Very Expensive

11.4x home value to income ratio

Median gross rent $2,213/mo 19.0% of median household income annually

People & Demographics

Age Distribution

Under 18

20.5%

18-34

17.3%

35-54

32.8%

55-74

23.2%

75+

6.2%

Race & Ethnicity

Diversity Index

Moderate Diversity

Moderate diversity with one or two groups making up the majority.

State average: 53 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Nantucket County

City	Population	Median Income	Poverty	Home Value
Nantucket	10,017	$148,017	3.2%	$1,465,300
Madaket	377	$112,500	0.0%	$1,637,500
Siasconset	204	N/A	37.4%	$1,652,200

Explore Massachusetts Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Nantucket County is located in Massachusetts with a total population of 14,483. It is the 14th most populous county out of 14 in Massachusetts. The county encompasses 3 Census-designated places.

Age Demographics

The median age in Nantucket County is 42.4 years. This is 6% higher than the state median of 40.0 years.

Economy, Income & Housing

The median household income in Nantucket County is $139,688. This is 34% higher than the state median of $103,960. It is also 73% higher than the national median of $80,734. The poverty rate stands at 3.2%. This is 69% lower than the state poverty rate of 10.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 4.3%. This is 16% lower than the state rate of 5.1%. The median home value is $1,593,800. Housing costs are 184% higher than the state median of $562,100. The home-value-to-income ratio of 11.4x suggests that housing affordability is a significant concern for many residents. 71.8% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 62.5%.

Race & Ethnicity

The largest racial or ethnic group in Nantucket County is White (non-Hispanic), making up 68.2% of the population. Hispanic or Latino residents account for 17.0%. The Asian population (1.7%) is well below the state average of 7.2%.

Education

56.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 19% higher than the state rate of 47.3%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.2%. Notably, 21.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All figures for Nantucket County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Massachusetts and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Nantucket County, Massachusetts?

Nantucket County has a population of 14,483, making it the 14th most populous county in Massachusetts.

What is the median income in Nantucket County?

The median household income in Nantucket County is $139,688 with a poverty rate of 3.2%.

How many cities are in Nantucket County, Massachusetts?

Nantucket County contains 3 Census-designated places.