Selden, NY · standard
ZIP Code 11784
Suffolk County, New York - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 24,655
- 1,742/sq mi High-density area
- $104,369
- Median income Above-median income area
- $460,300
- Median home value Above-median home value
- 29.2%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Selden pairs an upper-quartile household income with upper-quartile home values, in a low-density, homeowner-dominated area.
- Top 16%
- household income, US ZIPs
- Top 15%
- home value, US ZIPs
- 1,742
- people per sq mi
- 84%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 11784 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 11784 (Selden, NY) rose +6.2% from 2023 to 2024. The all-transactions index moved from 298.2 in 2023 to 316.6 in 2024 (2000 = 100).
ZIP code 11784 is a densely settled ZIP (a standard USPS delivery area) in Selden, Suffolk County, New York, with 24,655 residents across 14.2 square miles, a density of 1,742 people per square mile, in the New York time zone.
ZIP 11784 lands in the middle-income range, with a median household income of $104,369 (13% above the average New York ZIP), while per-capita income is $43,370. Both reported hardship measures are comparatively low in absolute terms: poverty is 6.4% and unemployment is 3.5%. Housing is both higher-cost and owner-heavy: median home value is $460,300 (22% above the average New York ZIP), while 84.0% of occupied homes are owner-occupied and median rent is $2,240.
Educational attainment sits below the national norm: 29.2% of adults hold a bachelor's degree or higher, the median age is 39, and the average commute is 32 minutes. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Suffolk County, so 11784 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 11784
Top 5 sectors by establishment count in Selden, NY
Which industries have the most business establishments in ZIP 11784.
- Construction
Construction
96 establishments
- Retail trade
Retail trade
74 establishments
- Other services (except public administration)
Other services (except public administration)
72 establishments
- Accommodation and food services
Accommodation and food services
55 establishments
- Health care and social assistance
Health care and social assistance
54 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 11784, Selden, 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
24,655
Population
14.2
Area (sq mi)
1,742
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 11784?
39.0
Median Age
49.6%
Male
50.4%
Female
15.3%
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?
$104,369
Median Household Income
+13% vs state ZIP avg
$43,370
Per Capita Income
6.4%
Poverty Rate
3.5%
Unemployment Rate
32.1 min
Mean Commute Time
How ZIP 11784 ranks among New York ZIPs
Selden, 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)
$104,369 Top 27% higher than 73% 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
9,032housing units
9,032
Total Housing Units
8,639
Occupied Units
393
Vacant Units
3.02
Avg Household Size
Occupancy Type
$460,300
Median Home Value
+22% vs state ZIP avg
$2,240
Median Rent
1969
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
+6.2%
YoY Change (2024)
317
HPI Index (2000 = 100)
+217%
Total Change Since 2000
Home values in ZIP 11784 have increased 6.2% over the past year (2024). Since 2000, this ZIP has seen +217% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +6.0% | 213 |
| 2021 | +12.1% | 239 |
| 2022 | +15.0% | 275 |
| 2023 | +8.5% | 298 |
| 2024 | +6.2% | 317 |
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 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 495 business establishments in ZIP 11784, employing approximately 2,999 people with a combined annual payroll of $109,026,000.
495
Businesses
2,999
Employees
$109.0M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 96 | 19.4% |
| Retail trade | 74 | 14.9% |
| Other services (except public administration) | 72 | 14.6% |
| Accommodation and food services | 55 | 11.1% |
| Health care and social assistance | 54 | 10.9% |
| Professional, scientific, and technical services | 40 | 8.1% |
| Administrative and support and waste management and remediation services | 38 | 7.7% |
| Finance and insurance | 16 | 3.2% |
| Wholesale trade | 14 | 2.8% |
| Transportation and warehousing | 8 | 1.6% |
| Educational services | 8 | 1.6% |
| Arts, entertainment, and recreation | 8 | 1.6% |
| Information | 6 | 1.2% |
| Real estate and rental and leasing | 5 | 1.0% |
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 11784 vs 11738 →
ZIP 11784 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11720
Centereach (11720)
29,189 residents
- 11727
Coram (11727)
29,030 residents
- 11763
Medford (11763)
28,506 residents
- 11741
Holbrook (11741)
27,655 residents
- 11784
Selden (11784)
24,655 residents
- 11776
Port Jefferson Station (11776)
24,235 residents
- 11738
Farmingville (11738)
17,638 residents
- 11742
Holtsville (11742)
13,261 residents
- 11766
Mount Sinai (11766)
12,635 residents
What this shows Among its immediate neighbors, ZIP 11784 ranks #5 by population - useful context the national average alone can't give.
ZIP 11784 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 11766
Mount Sinai (11766)
$153,235 median income
- 11777
Port Jefferson (11777)
$150,505 median income
- 11741
Holbrook (11741)
$144,346 median income
- 11738
Farmingville (11738)
$140,121 median income
- 11720
Centereach (11720)
$134,898 median income
- 11742
Holtsville (11742)
$125,162 median income
- 11763
Medford (11763)
$120,783 median income
- 11776
Port Jefferson Station (11776)
$120,573 median income
- 11755
Lake Grove (11755)
$119,364 median income
What this shows By household income, ZIP 11784 ranks #null of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 11738 | Farmingville, NY | 17,638 | 2.1 mi |
| 11720 | Centereach, NY | 29,189 | 2.1 mi |
| 11776 | Port Jefferson Station, NY | 24,235 | 3.1 mi |
| 11727 | Coram, NY | 29,030 | 2.1 mi |
| 11742 | Holtsville, NY | 13,261 | 4.1 mi |
| 11755 | Lake Grove, NY | 12,387 | 4.0 mi |
| 11766 | Mount Sinai, NY | 12,635 | 4.8 mi |
| 11763 | Medford, NY | 28,506 | 4.2 mi |
| 11741 | Holbrook, NY | 27,655 | 5.3 mi |
| 11777 | Port Jefferson, NY | 8,968 | 5.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 11784, 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 (24,655 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 11784 in?
ZIP code 11784 (Selden) 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 11784?
ZIP code 11784 in Selden, NY has a population of 24,655 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 11784?
The median household income in ZIP 11784 is $104,369, which is 37% above the national average of $76,288.
What is the average home value in ZIP 11784?
The median home value in ZIP 11784 is $460,300, which is 65% above the national average of $278,155.
What is the demographic makeup of ZIP 11784?
The largest racial group in ZIP 11784 is White at 63.1%. Hispanic or Latino residents make up 23.9% of the population.
How many businesses are in ZIP code 11784?
ZIP code 11784 has 495 business establishments employing approximately 2,999 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 11784?
The top industries by establishment count in ZIP 11784 are: Construction (96), Retail trade (74), Other services (except public administration) (72). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 11784?
According to the FHFA House Price Index, home values in ZIP 11784 increased by 6.2% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 217%. 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 11784?
In ZIP code 11784, 62.9% of residents aged 25+ have a high school diploma or higher, and 29.2% 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 11784?
The mean commute time for workers in ZIP code 11784 is 32.1 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 11784?
In ZIP code 11784, approximately 84.0% of occupied housing units are owner-occupied and 16.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 11784?
The poverty rate in ZIP code 11784 is 6.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 11784's numbers, next.
- See how ZIP 11784 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Selden, NY ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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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.