Roslyn Harbor, NY

Village in Nassau County, NY, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

1,036

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

43.9

years ∙ half population younger than 43.9, half older

Diversity Index

49.6%

chance two random people differ in race and ethnicity

Nativity

20.1%

foreign-born population

79.9%Native

20.1% Foreign-born

Geographic Context

Location, size, and surroundings

About

Roslyn Harbor is a village within Nassau County, New York, United States.

Location

Village in Nassau County, NY, US

Co-ordinates

DEC40.811234° N, 73.640582° W

DMS40° 48′ 40.44″ N, 73° 38′ 26.10″ W

Population Density & area

870.6/sq mi (336.4/km²)

Total Area

1.19 sq mi (3.08 km²)

Land Area

1.19 sq mi (3.08 km²) · 99.87%

Water Area

0 sq mi (0 km²) · 0.13%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

50.6% male

Male 50.6%

Female 49.4%

males per 100 females

Roslyn Harbor 102.3

Nassau County 96.9

New York 95.5

Nativity

20.1%

foreign-born population

79.9%Native

20.1% Foreign-born

% Foreign-born

Roslyn Harbor 20.1%

Nassau County 23.3%

New York 22.8%

Age Distribution

How the population is spread across age groups

Median Age

43.9

years ∙ half population younger than 43.9, half older

Roslyn Harbor

43.9

Nassau County

New York

39.8

Dependency ratio

91.5

dependents per 100 working-age adults

Roslyn Harbor 91.5

Nassau County 67.1

New York 62.3

AGE DISTRIBUTION

Distribution of age group

Median age

	Roslyn Harbor	Nassau County	New York
Age Group
Children (Under 18)	24.8%	21.5%	20.5%
Working age (18-64)	52.2%	59.8%	61.6%
Senior (65+)	23%	18.7%	17.9%
Dependency ratio
Total dependency ratio	91.5	67.1	62.3
Child dependency ratio	47.5	35.9	33.2
Old-age dependency ratio	44	31.2	29.1

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

68.1%

Black

4.5%

Asian

17.8%

Hispanic

7.7%

Other

1.9%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

49.6%

chance two random people differ in race and ethnicity

Roslyn Harbor 49.6%

Nassau County 64.3%

New York 65.4%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Roslyn Harbor population

	Roslyn Harbor	Nassau County	New York
Hispanic or Latino	7.7%	18.7%	19.8%
Mexican	0%	1.1%	2.6%
Puerto Rican	0.3%	2.7%	5.1%
Cuban	0%	0.5%	0.4%
Other Hispanic / Latino	7.4%	14.4%	11.8%
Not Hispanic or Latino	92.3%	81.3%	80.2%
One race	90.4%	78.3%	76.4%
White	68.1%	54.3%	52.8%
Black or African American	4.5%	10.8%	13.4%
American Indian and Alaska Native	0%	0%	0.2%
Asian	17.8%	12.2%	9%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	0%	1%	1%
Two or more races (Multiracial)	1.9%	3%	3.8%

Household & Families Composition

Household size, type, and family structure

Household structure

91.5% family

Family 91.5%

Non family 8.5%

% family households

Roslyn Harbor 91.5%

Nassau County 77%

New York 61.4%

Average household size

3.25

persons per household

Roslyn Harbor

3.25

Nassau County

2.99

New York

2.49

Household & Family COMPOSITION

Households

Percentage of Roslyn Harbor population

	Roslyn Harbor	Nassau County	New York
Total households	319	458,166	7,722,646
Average houshold size	3.25	2.99	2.49
Family households	292	352,956	4,738,075
Average family size	3.39	3.42	3.16
Married couple family	264	278,403	3,279,487
Other families	28	74,553	1,458,588
Male householder	1	21,294	398,169
Female householder	27	53,259	1,060,419
Non-family households	27	105,210	2,984,571
One-person households	27	87,683	2,398,170
Male householder	14	33,112	1,045,868
Senior (65+) living alone	9	14,889	332,696
Female householder	13	54,571	1,352,302
Senior (65+) living alone	13	36,534	673,031
Other living arrangements	0	17,527	586,401

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

321

housing units

Roslyn Harbor 321

Nassau County 479,044

New York 8,585,241

Occupancy status

99.4% occupied

Occupied 99.4%

Vacant 0.6%

vacancy rate

Roslyn Harbor 0.6%

Nassau County 4.4%

New York 10%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

100%

Single family houses

100%

Apartments in multi-unit structures

Mobile homes

Boat, RV, van, etc

Median Year Built

1958

Half of houses were built before 1958, and half after.

Historic ∙ 1939 or earlier

19%

Postwar & mid-century ∙ 1940 - 1969

55.8%

Late 20th century ∙ 1970 - 1999

19.9%

Modern ∙ 2000 or later

5.3%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Roslyn Harbor	Nassau County	New York
Rooms per unit
Median rooms	8.4	6.5	5
1–3 rooms	0.6%	9.9%	24.3%
4–6 rooms	25.2%	39.8%	48.4%
7+ rooms	74.1%	50.3%	27.2%
Bedrooms
No bedroom / studio	0.6%	2.3%	5.4%
1 bedroom	0%	8.2%	19%
2 bedrooms	4.4%	14.1%	26.6%
3 bedrooms	27.1%	36.9%	31.1%
4+ bedrooms	68%	38.5%	17.9%
At a glance
Median year built	1958	1955	1959
Total housing units	321	479,044	8,585,241

Occupancy Profile

Who is inside and how they use it

Homeownership

94.7% owners

Renter-occupied 5.3%

Owner-occupied 94.7%

homeownership rate

Roslyn Harbor 94.7%

Nassau County 81.9%

New York 54.3%

Average household size

3.28

Owner-occupied

2.59

Renter-occupied

owner-occupied average size

Roslyn Harbor 3.28

Nassau County 3.08

New York 2.66

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Roslyn Harbor	Nassau County	New York
Total occupied units	319	458,166	7,722,646
Year moved in
2020 or later	20.1%	14%	20.5%
2010 to 2019	32.9%	32.1%	36.5%
2000 to 2009	17.2%	20.5%	17.8%
1999 or earlier	29.8%	33.4%	25.2%
Occupants per room
1.00 or fewer	100%	96.6%	94.7%
1.01 to 1.50	0%	2.3%	3.1%
1.51 or more	0%	1.1%	2.2%
Vehicles availability
No vehicles	0.9%	6.8%	29.2%
1 vehicle	12.9%	28.6%	33.6%
2 vehicles	49.8%	41.4%	25.4%
3 or more vehicles	36.4%	23.3%	11.8%
House heating fuel used
Gas	71.1%	64.7%	64%
Electricity	10%	7.3%	15.4%
Solar	0%	0.3%	0.1%
Fuel oil, kerosene etc	18.8%	26.5%	16.1%
All other fuels	0%	0.7%	2.8%
No fuel used	0%	0.6%	1.6%
Selected characteristics
Lacking complete plumbing	0.9%	0.3%	0.4%
Lacking complete kitchen	0.9%	0.7%	0.8%
No telephone service available	0%	0.9%	0.9%

Housing Value

What owner-occupied units are worth

Median home value

$1,525,000

owner-occupied units

Median value(USD)

Roslyn Harbor

$1,525,000

Nassau County

$684,700

New York

$423,800

Housing Cost Burden

50.8%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

50.8%

Owners without a mortgage

22.2%

Renters

81.3%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Roslyn Harbor	Nassau County	New York
Property value
Median Value	$1,525,000	$684,700	$423,800
Under $100,000	1%	2.2%	9.5%
$100,000 - $200,000	1%	1.3%	15%
$200,000 - $300,000	0%	2.4%	13.2%
$300,000 - $500,000	2.6%	14.1%	19.7%
$500,000 - $1,000,000	19.9%	63.4%	30.1%
$1,000,000 and more	75.5%	16.6%	12.6%
Owner-occupied households
With a mortgage	61.9%	62.1%	57.8%
Without a mortgage	38.1%	37.9%	42.2%
Median monthly owner costs
With a mortgage	$4,001	$3,795	$2,555
Without a mortgage	$1,501	$1,501	$958
Gross rent
Median rent	$2,308	$2,252	$1,621

Education Profile

How educated is the community and how education pays off

Adults with a college degree

70%

of adults 25+ with a bachelor's degree or higher

Roslyn Harbor 70%

Nassau County 49.7%

New York 40.2%

Adults without a high school diploma

3.4%

of adults (25+) without a high school diploma

Roslyn Harbor 3.4%

Nassau County 7.8%

New York 12%

School Enrollment

Who is enrolled in school and at what level

School enrollment

332

population (age 3+) enrolled in school

Nursery / Preschool

11.1%

K–12

70.5%

College / Undergraduate

13.9%

Graduate / Professional

4.5%

College-going rate (18-24 yr olds)

42.7%

of 18-24-year-olds in college or graduate school

Roslyn Harbor

42.7%

Nassau County

54.7%

New York

48.5%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Roslyn Harbor	Nassau County	New York
Total enrolled (age 3+)	332	343,669	4,642,703
Nursery / preschool	11.1%	6.4%	6.1%
K–12	70.5%	65%	64.1%
Kindergarten	2.4%	4.5%	4.9%
Elementary: Grades 1–4	9.3%	18.9%	18.7%
Elementary: Grades 5–8	25.3%	19.8%	20.1%
High School: Grades 9–12	33.4%	21.8%	20.4%
College or graduate school	18.4%	28.6%	29.8%
College, undergraduate	13.9%	20.6%	22.5%
Graduate, professional school	4.5%	8%	7.3%
College-going rate · 18-24 yr olds	42.7%	54.7%	48.5%
School type
Public school	71.7%	74.2%	74.7%
Private school	28.3%	25.8%	25.3%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

704

population 25 years and over

Total adults (25+)

Less than 9th grade

2.8%

9th-12th, no diploma

0.6%

HS graduate

11.8%

Some college no degree

7.5%

Associates degree

7.2%

Bachelors degree

27.7%

Graduate or professional degree

42.3%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

25% · 75%

9th-12th, no diploma

50% · 50%

HS graduate

34.9% · 65.1%

Some college no degree

64.2% · 35.8%

Associates degree

45.1% · 54.9%

Bachelors degree

52.3% · 47.7%

Graduate or professional degree

47.7% · 52.3%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Roslyn Harbor	Nassau County	New York
Population (25+)	704	975,442	14,017,184
Less than 9th grade	2.8%	4.3%	6%
9th–12th, no diploma	0.6%	3.5%	6%
High school diploma or GED	11.8%	20.7%	24.3%
Some college, no degree	7.5%	13.7%	14.6%
Associate's degree	7.2%	8.1%	8.8%
Bachelor's degree or higher	70%	49.7%	40.2%
Bachelor's degree	27.7%	26.8%	22.4%
Graduate or professional	42.3%	22.8%	17.9%
High School or higher	96.6%	92.2%	88%

Earnings by education level

percentage as applicable

Median Earnings

$93,182

Median earnings for adults 25+, by level

Less than HS graduate

$—

HS graduate

$—

Some college or associates

$—

Bachelors degree

$91,607

Graduate or professional degree

$114,167

Poverty Rate

5.3%

for ages 25+, with bachelors degree or higher

Less than HS graduate

29.2%

HS graduate

10.8%

Some college or associates

16.3%

Bachelors degree or higher

5.3%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Roslyn Harbor	Nassau County	New York
Median earnings
Population 25+, with earnings	$93,182	$74,834	$57,966
Less than high school graduate	$—	$36,352	$31,511
High school graduate (includes equivalency)	$—	$47,921	$40,549
Some college or associate's degree	$—	$61,483	$49,306
Bachelor's degree	$91,607	$91,511	$76,052
Graduate or professional degree	$114,167	$110,846	$95,435
Poverty rates
Less than high school graduate	29.2%	15.6%	28.1%
High school graduate (includes equivalency)	10.8%	7.9%	16.8%
Some college or associate's degree	16.3%	5%	11.4%
Bachelor's degree or higher	5.3%	2.5%	5.3%

Insights for Roslyn Harbor, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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