Population & Demographics By Town (2025)
This page summarizes the latest population and core demographic indicators for every major town on Long Island (Nassau & Suffolk Counties), using the U.S. Census Bureau’s American Community Survey. Bookmark this resource for up-to-date reference, and link to it in your reports, research, or local coverage.
Source: U.S. Census Bureau American Community Survey (ACS) 2023 (1-year where available) and 2019–2023 ACS and 2019–2023 ACS 5-year for some indicators.
Methodology
- Population: U.S. Census Bureau, American Community Survey (ACS) 2023 1-year estimates where available; otherwise 2019–2023 ACS 5-year estimates.
- Median household income: ACS 2019–2023 5-year estimates, inflation-adjusted to 2023 dollars.
- Median age and % Bachelor’s degree or higher: ACS 2023 1-year where available; otherwise 2019–2023 5-year.
- All figures are rounded. Margins of error apply. For source details, see the Census Bureau ACS Data Profiles for each town.
Nassau County Towns
| Town | Population (2023) | Median Household Income (2019–2023) | Median Age (2023) | Bachelor’s+ (2023) |
|---|---|---|---|---|
| Hempstead (Town) | 785,683 | $134,979 | 40.9 | 44% |
| North Hempstead (Town) | 235,780 | $152,874 | 45.1 | 57.6% |
| Oyster Bay (Town) | 297,782 | $156,073 | 43.6 | 54.1% |
Suffolk County Towns
| Town | Population (2023) | Median Household Income (2019–2023) | Median Age (2023) | Bachelor’s+ (2023) |
|---|---|---|---|---|
| Brookhaven (Town) | 487,817 | $119,160 | 40.0 | 38.0% |
| Islip (Town) | 336,813 | $118,465 | 39.5 | 32.2% |
| Huntington (Town) | 202,938 | $164,196 | 46.0 | 56.1% |
| Babylon (Town) | 217,034 | $125,008 | 38.6 | 33.5% |
| Smithtown (Town) | 115,461 | $149,894 | 45.8 | 48.8% |
| Southampton (Town) | 69,697 | $123,263 | 51.1 | 47.4% |
| East Hampton (Town) | 28,405 | $128,938 | 50.7 | 47.1% |
| Riverhead (Town) | 35,826 | $93,595 | 51.6 | 34.9% |
| Southold (Town) | 23,801 | $109,152 | 52.9 | 43.3% |
| Shelter Island (Town) | 3,279 | $128,976 | 59.5 | 55.2% |
Town Profiles & Data Notes
Note: The following town profiles repeat the demographic data above in text form. This improves accessibility for mobile and screen-reader users who may find paragraph form easier to digest than scrolling wide tables.
Hempstead (Town)
- Population 2023: 785,683 · Median household income: $134,979 · Median age: 40.9 · Bachelor’s+: 44%
North Hempstead (Town)
- Population 2023: 235,780 · Median household income: $152,874 · Median age: 45.1 · Bachelor’s+: 57.6%
Oyster Bay (Town)
- Population 2023: 297,782 · Median household income: $156,073 · Median age: 43.6 · Bachelor’s+: 54.1%
Brookhaven (Town)
- Population 2023: 487,817 · Median household income: $119,160 · Median age: 40.0 · Bachelor’s+: 38.0%
Islip (Town)
- Population 2023: 336,813 · Median household income: $118,465 · Median age: 39.5 · Bachelor’s+: 32.2%
Huntington (Town)
- Population 2023: 202,938 · Median household income: $164,196 · Median age: 46.0 · Bachelor’s+: 56.1%
Babylon (Town)
- Population 2023: 217,034 · Median household income: $125,008 · Median age: 38.6 · Bachelor’s+: 33.5%
Smithtown (Town)
- Population 2023: 115,461 · Median household income: (N/A) · Median age: 45.8 · Bachelor’s+: 48.8%
Southampton (Town)
- Population 2023: 69,697 · Median household income: $123,263 · Median age: 51.1 · Bachelor’s+: 47.4%
East Hampton (Town)
- Population 2023: 28,405 · Median household income: $128,938 · Median age: 50.7 · Bachelor’s+: 47.1%
Riverhead (Town)
- Population 2023: 35,826 · Median household income: $93,595 · Median age: 51.6 · Bachelor’s+: 34.9%
Southold (Town)
- Population 2023: 23,801 · Median household income: $109,152 · Median age: 52.9 · Bachelor’s+: 43.3%
Shelter Island (Town)
- Population 2023: 3,279 · Median household income: $128,976 · Median age: 59.5 · Bachelor’s+: 55.2%
© 2025 LongIslandGuide.com • Built from U.S. Census Bureau American Community Survey data.
