Cold Spring Harbor, NY · standard
ZIP Code 11724
Suffolk County, New York - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 3,220
- 322/sq mi High-density area
- $250,000+
- Median income Above-median income area
- $1,641,000
- Median home value Above-median home value
- 79.4%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
Cold Spring Harbor pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.
- Top 1%
- household income, US ZIPs
- Top 1%
- home value, US ZIPs
- 322
- people per sq mi
- 93%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 11724 against every reporting US ZIP.
ZIP code 11724 covers 10.0 square miles in Cold Spring Harbor, Suffolk County, New York (a standard USPS delivery area), with a modest 3,220 residents on file, a density of 322 people per square mile, in the New York time zone.
ZIP 11724 skews affluent, with a median household income of $250,000+ (170% above the average New York ZIP), while per-capita income is $112,377. Both reported hardship measures are comparatively low in absolute terms: poverty is 2.3% and unemployment is 1.0%. Housing is both higher-cost and owner-heavy: median home value is $1,641,000 (334% above the average New York ZIP), while 92.7% of occupied homes are owner-occupied.
This is a highly-educated ZIP: 79.4% of adults hold a bachelor's degree or higher, the median age is 41.5, and the average commute is 35 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Suffolk County, so 11724 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 11724
Top 5 sectors by establishment count in Cold Spring Harbor, NY
Which industries have the most business establishments in ZIP 11724.
- Professional, scientific, and technical services
Professional, scientific, and technical services
21 establishments
- Construction
Construction
19 establishments
- Retail trade
Retail trade
12 establishments
- Real estate and rental and leasing
Real estate and rental and leasing
12 establishments
- Other services (except public administration)
Other services (except public administration)
12 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 11724, Cold Spring Harbor, NY · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
3,220
Population
10.0
Area (sq mi)
322
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 11724?
41.5
Median Age
52.0%
Male
48.0%
Female
7.9%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$250,000+
Median Household Income
+170% vs state ZIP avg
$112,377
Per Capita Income
2.3%
Poverty Rate
1.0%
Unemployment Rate
34.9 min
Mean Commute Time
How ZIP 11724 ranks among New York ZIPs
Cold Spring Harbor, NY household income vs. every New York ZIP code
Median household income among 1,626 reporting New York ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$250,000 Top 1% higher than 99% of 1,626 New York ZIPs
Each bar is a $20K-wide band; taller bars hold more New York ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
1,068housing units
1,068
Total Housing Units
1,017
Occupied Units
51
Vacant Units
2.92
Avg Household Size
Occupancy Type
$1,641,000
Median Home Value
+334% vs state ZIP avg
1961
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
-8.8%
YoY Change (2023)
173
HPI Index (2000 = 100)
+73%
Total Change Since 2000
Home values in ZIP 11724 have decreased 8.8% over the past year (2023). Since 2000, this ZIP has seen +73% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2018 | +2.6% | 156 |
| 2020 | – | 166 |
| 2021 | -0.7% | 165 |
| 2022 | +14.8% | 190 |
| 2023 | -8.8% | 173 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2023. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 131 business establishments in ZIP 11724, employing approximately 1,375 people with a combined annual payroll of $118,891,000.
131
Businesses
1,375
Employees
$118.9M
Annual Payroll
12
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Professional, scientific, and technical services | 21 | 16.0% |
| Construction | 19 | 14.5% |
| Retail trade | 12 | 9.2% |
| Real estate and rental and leasing | 12 | 9.2% |
| Other services (except public administration) | 12 | 9.2% |
| Health care and social assistance | 11 | 8.4% |
| Finance and insurance | 10 | 7.6% |
| Wholesale trade | 8 | 6.1% |
| Arts, entertainment, and recreation | 7 | 5.3% |
| Accommodation and food services | 6 | 4.6% |
| Administrative and support and waste management and remediation services | 5 | 3.8% |
| Educational services | 3 | 2.3% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 11724 vs 11743 →
ZIP 11724 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11743
Huntington (11743)
42,230 residents
- 11803
Plainview (11803)
28,127 residents
- 11791
Syosset (11791)
25,076 residents
- 11771 10,007
Oyster Bay (11771)
10,007 residents
- 11740 9,454
Greenlawn (11740)
9,454 residents
- 11797 9,041
Woodbury (11797)
9,041 residents
- 11721 6,292
Centerport (11721)
6,292 residents
- 11804 5,010
Old Bethpage (11804)
5,010 residents
- 11732 3,430
East Norwich (11732)
3,430 residents
What this shows Among its immediate neighbors, ZIP 11724 ranks #0 by population - useful context the national average alone can't give.
ZIP 11724 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11724
Cold Spring Harbor (11724)
$250,000 median income
- 11791
Syosset (11791)
$202,962 median income
- 11721
Centerport (11721)
$197,179 median income
- 11765
Mill Neck (11765)
$196,902 median income
- 11797
Woodbury (11797)
$192,609 median income
- 11804
Old Bethpage (11804)
$190,469 median income
- 11803
Plainview (11803)
$187,514 median income
- 11743
Huntington (11743)
$183,187 median income
- 11771
Oyster Bay (11771)
$157,923 median income
What this shows By household income, ZIP 11724 ranks the highest of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 11743 | Huntington, NY | 42,230 | 1.8 mi |
| 11797 | Woodbury, NY | 9,041 | 3.4 mi |
| 11771 | Oyster Bay, NY | 10,007 | 3.8 mi |
| 11791 | Syosset, NY | 25,076 | 3.7 mi |
| 11740 | Greenlawn, NY | 9,454 | 4.8 mi |
| 11803 | Plainview, NY | 28,127 | 5.9 mi |
| 11732 | East Norwich, NY | 3,430 | 4.6 mi |
| 11804 | Old Bethpage, NY | 5,010 | 7.4 mi |
| 11721 | Centerport, NY | 6,292 | 4.8 mi |
| 11765 | Mill Neck, NY | 737 | 5.6 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 11724, both outside NY so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (3,220 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Suffolk County
Related Areas
Frequently Asked Questions
What county is ZIP code 11724 in?
ZIP code 11724 (Cold Spring Harbor) is located in Suffolk County, New York. Suffolk County contains multiple ZIP codes, see the full list at /counties/suffolk-ny.
What is the population of ZIP code 11724?
ZIP code 11724 in Cold Spring Harbor, NY has a population of 3,220 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 11724?
The median household income in ZIP 11724 is $250,000+, which is 228% above the national average of $76,288.
What is the average home value in ZIP 11724?
The median home value in ZIP 11724 is $1,641,000, which is 490% above the national average of $278,155.
What is the demographic makeup of ZIP 11724?
The largest racial group in ZIP 11724 is White at 87.1%. Hispanic or Latino residents make up 2.6% of the population.
How many businesses are in ZIP code 11724?
ZIP code 11724 has 131 business establishments employing approximately 1,375 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 11724?
The top industries by establishment count in ZIP 11724 are: Professional, scientific, and technical services (21), Construction (19), Retail trade (12). There are 12 industry sectors represented in total.
How have home values changed in ZIP code 11724?
According to the FHFA House Price Index, home values in ZIP 11724 decreased by 8.8% in 2023. Since 2000, home values in this ZIP have appreciated by approximately 73%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 11724?
In ZIP code 11724, 85.8% of residents aged 25+ have a high school diploma or higher, and 79.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 11724?
The mean commute time for workers in ZIP code 11724 is 34.9 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 11724?
In ZIP code 11724, approximately 92.7% of occupied housing units are owner-occupied and 7.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 11724?
The poverty rate in ZIP code 11724 is 2.3% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
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What to do with ZIP 11724's numbers, next.
- See how ZIP 11724 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.