Census-designated place · New York
Cold Spring Harbor, New York
Cold Spring Harbor, census-designated place, in Suffolk County, New York. Cold Spring Harbor had 3,064 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 3,220 (±430). GEOID 3616958.
Residents, 2020 Census
3,064
Census count or controlled total
ACS 2020-2024 estimate: 3,220 ±430
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
New York: $85,974
Median home value
$1,587,900
±$116,011 (90% margin)
New York: $423,800
Median gross rent
not published
New York: $1,621
Where is Cold Spring Harbor and what county is it in?
Cold Spring Harbor is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Suffolk County, New York. It covers 3.4 square miles of land, 898 residents per square mile in 2020.
Cold Spring Harbor is in the New York-Newark-Jersey City, NY-NJ metropolitan statistical area, which takes in 22 counties (Census Bureau delineation, July 2023).
Cold Spring Harbor lies entirely within the Town of Huntington, a town with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Cold Spring Harbor, and is it growing?
The 2020 Census counted 3,064 residents in Cold Spring Harbor, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 3,220 (±430).
The Census Bureau publishes yearly population estimates for incorporated places only; Cold Spring Harbor is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Cold Spring Harbor | Suffolk County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,220 ±430 | 1,530,146 | −1,712 |
| Households | 1,030 ±142 | 512,565 | −641 |
| Average household size | 3.02 ±0.15 | 2.93 | no clear change |
| Housing units | 1,081 ±164 | 580,772 | −804 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Cold Spring Harbor?
The median resident of Cold Spring Harbor is 40.4 years old; 27.0% are under 18 and 14.0% are 65 or older. The largest group is non-Hispanic white residents at 88.4%, then non-Hispanic Asian residents at 4.3%. 7.0% of residents were born outside the United States.
| Measure | Cold Spring Harbor | Suffolk County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.4 ±6.4 | 41.7 | no clear change |
| Under 18 years | 27.0% ±3.3 pts | 20.8% | – |
| 65 years and over | 14.0% ±2.9 pts | 17.9% | – |
| Male | 52.3% ±3.2 pts | 49.6% | – |
| Hispanic or Latino (any race) | 1.9% ±1.6 pts | 22.8% | – |
| White alone, not Hispanic | 88.4% ±5.9 pts | 62.0% | no clear change |
| Black or African American alone, not Hispanic | 0.4% ±0.4 pts | 6.9% | – |
| Asian alone, not Hispanic | 4.3% ±2.4 pts | 4.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.3 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.4% ±3.5 pts | 3.0% | – |
| Some other race alone, not Hispanic | 1.6% ±2.4 pts | 0.7% | – |
| Born outside the United States | 7.0% ±2.6 pts | 16.8% | no clear change |
| Speak a language other than English at home (age 5+) | 14.1% ±5.6 pts | 24.8% | – |
| Civilian veterans (age 18+) | 2.0% ±1.2 pts | 4.0% | – |
| With a disability | 1.6% ±1.1 pts | 10.5% | – |
| No health insurance coverage | 1.0% ±1.2 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 97.7% ±1.6 pts | 90.4% | – |
| Bachelor's degree or higher (age 25+) | 76.7% ±5.7 pts | 40.2% | no clear change |
| Graduate or professional degree (age 25+) | 34.7% ±6.5 pts | 18.6% | – |
| Lived in the same house a year earlier | 96.0% ±1.9 pts | 92.8% | – |
| Moved from another state in the past year | 0.0% ±1.3 pts | 0.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Cold Spring Harbor earn?
Half of Cold Spring Harbor's 1,030 households earn less than $250,000 or more a year (), against $130,686 in Suffolk County and $85,974 in New York. In 2015-2019 it was $248,856 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Cold Spring Harbor | Suffolk County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $130,686 | no clear change |
| Mean household income | $325,019 ±$38,585 | $166,220 | – |
| Per capita income | $105,403 ±$12,327 | $57,164 | no clear change |
| People below the poverty line | 1.5% ±1.4 pts | 6.4% | – |
| Children under 18 below the poverty line | 0.0% ±4.8 pts | 7.1% | – |
| Households receiving SNAP | 1.6% ±1.7 pts | 7.2% | – |
| Households with a computer | 97.7% ±2.1 pts | 96.5% | – |
| Households with a broadband subscription | 97.5% ±2.2 pts | 93.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Cold Spring Harbor?
Owners occupy 93.5% of Cold Spring Harbor's occupied homes and renters 6.5%. The median owner-occupied home is valued at $1,587,900 by its owner (±$116,011).
| Measure | Cold Spring Harbor | Suffolk County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,587,900 ±$116,011 | $578,400 | +$563,717 |
| Renters paying 35% or more of income on rent | 0.0% ±67.8 pts | 49.0% | – |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,320 | – |
| Owner-occupied homes | 93.5% ±4.6 pts | 82.2% | no clear change |
| Renter-occupied homes | 6.5% ±4.6 pts | 17.8% | – |
| Housing units | 1,081 ±164 | 580,772 | −804 |
| Homeowner vacancy rate | 3.1% ±3.9 pts | 0.6% | – |
| Rental vacancy rate | 0.0% ±41.4 pts | 4.1% | – |
| Single-family detached homes | 91.6% ±8.8 pts | 79.7% | – |
| Mobile homes | 0.0% ±3.9 pts | 1.3% | – |
| Built 2020 or later | 0.6% ±1.0 pts | 0.7% | – |
| Built 2010 to 2019 | 2.5% ±2.2 pts | 3.7% | – |
| Built 1939 or earlier | 30.5% ±9.2 pts | 9.1% | – |
| Households with no vehicle | 5.7% ±8.8 pts | 5.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Cold Spring Harbor work and get to work?
50.7% of Cold Spring Harbor's workers drive alone and 28.9% work from home. The average trip to work takes 33.5 minutes.
| Measure | Cold Spring Harbor | Suffolk County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 68.1% ±4.9 pts | 65.5% | – |
| Unemployment rate | 1.5% ±1.5 pts | 4.7% | – |
| Drove alone to work | 50.7% ±7.3 pts | 72.1% | – |
| Carpooled | 1.5% ±1.5 pts | 7.5% | – |
| Public transportation | 9.9% ±3.8 pts | 4.8% | – |
| Walked | 3.8% ±2.6 pts | 1.4% | – |
| Worked from home | 28.9% ±6.5 pts | 12.0% | +22.5 pts |
| Mean travel time to work | 33.5 min ±5.3 | 31.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Cold Spring Harbor?
1 census tract lies mostly in Cold Spring Harbor, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 1101.04Suffolk County | 3,179 | $250,000 or more |
| Tract 1102Suffolk County | 5,375 | $168,000 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Cold Spring Harbor) · Census block assignment files
How does Cold Spring Harbor compare with other places in New York?
Cold Spring Harbor ranks 1st of 1,623 places in New York with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 886th | 1,657 |
| Residents per square mile | 713th | 1,657 |
| Median household income | 1st | 1,623 |
| Per capita income | 52nd | 1,653 |
| Median home value | 30th | 1,637 |
| Bachelor's degree or higher | 43rd | 1,640 |
| Median age | 1,161st | 1,654 |
| Owner-occupied share | 126th | 1,639 |
| Work from home | 45th | 1,350 |
| Travel time to work | 296th | 1,652 |
Cold Spring Harbor's figures with every place in New York (CSV)
Every place in New York, sortable · Compare Cold Spring Harbor with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Cold Spring Harbor?
23 of the 56 figures for Cold Spring Harbor on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Cold Spring Harbor are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.