Cold Spring Harbor, New York Demographics & Population 2026

Population Overview

Cold Spring Harbor is a small community located in New York, within Suffolk County. The total population is 3,220. It ranks as the 471st most populous out of 1,289 Census-designated places in New York.

Age Demographics

The median age in Cold Spring Harbor is 40.4 years. This is 2% higher than the state median of 39.8 years.

Economy, Income & Housing

The median household income in Cold Spring Harbor is $250,000+. This is 191% higher than the state median of $85,974. It is also 210% higher than the national median of $80,734. The poverty rate stands at 1.5%. This is 89% lower than the state poverty rate of 14.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 1.5%. This is 77% lower than the state rate of 6.4%. The median home value is $1,587,900. Housing costs are 275% higher than the state median of $423,800. The home-value-to-income ratio of 6.4x suggests that housing affordability is a significant concern for many residents. 93.5% of occupied housing units are owner-occupied. This homeownership rate is 72% higher than the state average of 54.4%.

Race & Ethnicity

Cold Spring Harbor has a predominantly White (non-Hispanic) population, comprising 88.4% of all residents. Asian residents account for 4.3%. The White (non-Hispanic) population is significantly higher than the state average (88.4% vs 52.8%). The Black or African American population (0.4%) is well below the state average of 13.4%. The Hispanic or Latino population (1.9%) is well below the state average of 19.8%. The Asian population (4.3%) is well below the state average of 9.0%.

Education

76.7% of residents aged 25 and older hold a bachelor's degree or higher. This places Cold Spring Harbor in the top 10% of all cities in the state for educational attainment. This is 91% higher than the state rate of 40.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.7%. Notably, 34.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Cold Spring Harbor, New York is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New York state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,289 Census-designated places in New York. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.