Islip, NY Elevation & Topographic Map
Elevation
270 ft 80 m200 ft 60 m170 ft 50 m100 ft 30 m33 ft 10 m0 ft 0 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- Town area
- Fades everything outside the official town boundaries (US Census).
Elevation Data
Islip sits at about 52 ft (16 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
52 ft 16 m
most residents: 14–100 ft
Lowest
0 ft 0 m
at sea level on Great South Bay
Highest
270 ft 80 m
on the north side
Average
50 ft 15 m
all land inside town boundaries
Islip spans about 270 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | 52 ft16 m |
| Highest point Inside town boundaries, on the north side | 270 ft80 m |
| Lowest point Where the land meets Great South Bay | 0 ft0 m |
| Town center USGS map point for Islip | 13 ft4 m |
| Airport (ISP) FAA airport elevation, the highest point of its runways | 99 ft30 m |
| Average of all land | 50 ft15 m |
Elevation profile, south to north
17 mi south to north through the town center.
Topographic Map
- Location
- Town in Suffolk County, New York, United States
- Population
- 339,170 2024 est.
- Land area
- 103.2 sq mi + 59.6 sq mi water
- Density
- 3,288 per sq mi
- Coordinates
- 40.7298° N, 73.2104° W
- Time zone
- Eastern UTC−5 / −4
- Landform region
- Coastal Plain
- Drains to
- Atlantic Ocean
- Airport
- Long Island Mac Arthur (ISP) 99 ft
- ZIP codes 20
- 11702 11705 11706 11716 11717 11718 11722 11730 11739 11741 11742 11749 11751 11752 11769 11779 11782 11788 11795 11796
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Brentwood93 ft
- North Bay Shore67 ft
- Islip52 ft
- North Great River40 ft
- Islip Terrace31 ft
- Bay Shore29 ft
- West Bay Shore24 ft
- Brightwaters23 ft
- East Islip19 ft
- Great River16 ft
- Oakdale8 ft
Rankings by typical elevation
- Towns in New York1,946th highest of 2,097
- Towns in Suffolk County75th highest of 162
Peaks and hills nearest, by height
- South Beacon Mountain1,600 ft
- High Hill, Suffolk County390 ft
- Dix Hills350 ft
- Signal Hill, Suffolk County320 ft
- Half Hollow Hills260 ft
How we measure
- Typical elevation: the population-weighted median: every 2020 Census block inside the town boundaries, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
- Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census town boundaries (TIGER, Jan 1 2026).
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, −7 ft at 40.7132° N, 73.2385° W, is in such a hollow or patch and is not counted; this coastal land's lowest point is sea level on the coast.
- Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (FAA airport elevation, NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas, ZIP code areas); FAA airport data; BTS time zones. All public domain.