South Dennis, MA Elevation & Topographic Map

Topographic elevation map of South Dennis, Massachusetts, shaded from sea level level on the Bass River to 86 ft on the northeast side
Elevation
87 ft 26 m65 ft 20 m54 ft 17 m32 ft 10 m11 ft 3 m0 ft 0 m
Contours every 100 ft, bold every 500 ft
USGS 3DEP · U.S. Census Bureau
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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.
Area
Fades everything outside the official CDP boundary (US Census).

Elevation Data

South Dennis sits at about 48 ft (15 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
48 ft 15 m
most residents: 28–65 ft
Lowest
0 ft 0 m
at sea level on the Bass River
Highest
86 ft 26 m
on the northeast side
Average
46 ft 14 m
all land inside the CDP boundary

South Dennis spans about 86 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.

FigureElevation
Typical
Where people live: half of residents higher, half lower
48 ft15 m
Highest point
Inside the CDP boundary, on the northeast side
86 ft26 m
Lowest point
Where the land meets the Bass River
0 ft0 m
Airport (HYA)
FAA airport elevation, the highest point of its runways, 5.6 mi west of the CDP boundary
54 ft16 m
Average of all land46 ft14 m

Elevation profile, west to east

2.5 mi west to east through the middle of South Dennis.

Topographic Map

Topographic elevation map of South Dennis, Massachusetts, shaded from sea level level on the Bass River to 86 ft on the northeast side
CDP boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
Unincorporated community (census-designated place) in Barnstable County, Massachusetts, United States
Population
3,899 2020 Census
Land area
4.5 sq mi + 0.2 sq mi water
Density
857 per sq mi
Coordinates
41.7059° N, 70.1609° W
Time zone
Eastern UTC−5 / −4
Landform region
Coastal Plain
Drains to
Atlantic Ocean
Airport
Cape Cod Gateway (HYA) 54 ft
ZIP codes 1
02660
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WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS, FAA

Nearby Places

Nearby towns by typical elevation

  1. East Dennis55 ft
  2. South Dennis48 ft
  3. Yarmouth Port48 ft
  4. Harwich Center44 ft
  5. Harwich42 ft
  6. Dennis32 ft
  7. Northwest Harwich30 ft
  8. Yarmouth25 ft
  9. South Yarmouth24 ft
  10. Dennis Port14 ft
  11. West Dennis13 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Hokum Rock160 ft
  • Scargo Hill160 ft
  • Black Ball Hill150 ft
  • German hill130 ft
  • Prospect Hill, Barnstable County120 ft
How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the CDP boundary, 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 CDP boundary (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, −2 ft at 41.6935° N, 70.1699° 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.
  • South Dennis is an unincorporated community; figures cover the census-designated place, a statistical area.
  • Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, Gazetteer areas, ZIP code areas); FAA airport data; BTS time zones. All public domain.