CDP in Suffolk County, New York · 4.7 sq mi · 3,556 people per sq mi
About 17,000 people live in Islip. The typical household earns $120,909, and the median resident is 43.9 years old.
2026 projection
From 16,965 in 2020
Poverty rate 5.7%
Men 43.3 · Women 45
2011–2026
16,886
2026 projection
0.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2011–2026
16,886
2026 projection
0.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 16,886 | -113 | 0.66% |
|---|---|---|---|
| 2025 | 16,999 | -225 | 0.66% |
| 2023 | 17,224 | -60 | 0.35% |
| 2022 | 17,284 | -157 | 0.90% |
| 2021 | 17,441 | +476 | 2.81% |
| 2020 | 16,965 | -888 | 4.97% |
| 2019 | 17,853 | -68 | 0.38% |
| 2018 | 17,921 | -333 | 1.82% |
| 2017 | 18,254 | +228 | 1.26% |
| 2016 | 18,026 | -407 | 2.21% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 174 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 18 residents
52% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 52% | 53% | 51% |
| Never married | 33% | 36% | 29% |
| Divorced | 8% | 7% | 9% |
| Widowed | 6% | 2% | 11% |
| Separated | 2% | 2% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau