Dorchester County, SC Elevation & Topographic Map
Elevation
230 ft 70 m170 ft 50 m140 ft 45 m86 ft 26 m29 ft 9 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.
- County area
- Fades everything outside the official county boundary (US Census).
Elevation Data
Dorchester County averages about 60 ft (18 m) above sea level across all its land. Its ground runs from 0 ft on the southeast side to 230 ft on the northeast side.
Average elevation
60 ft 18 m
all land inside the county
Highest
230 ft 70 m
on the northeast side
Lowest
0 ft 0 m
on the southeast side
Dorchester County spans about 230 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.
Under 1% of Dorchester County's land lies below the average daily high tide (MHHW, NOAA), and under 1% lies less than 3 ft above it. Check flood zones on FEMA's map
| Figure | Elevation |
|---|---|
| Average of all land | 60 ft18 m |
| Highest point Inside the county, on the northeast side | 230 ft70 m |
| Lowest point Inside the county, on the southeast side | 0 ft0 m |
Elevation profile, south to north
15 mi south to north through Summerville.
Topographic Map
- Location
- County in South Carolina, United States
- Population
- 174,663 2024 est.
- Land area
- 568.4 sq mi + 2.6 sq mi water
- Density
- 307 per sq mi
- Time zone
- Eastern UTC−5 / −4
- Landform region
- Coastal Plain
- Drains to
- Atlantic Ocean
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Orangeburg County180 ft
- Dorchester County60 ft
- Colleton County49 ft
- Berkeley County43 ft
- Charleston County13 ft
Rankings by average elevation
- Counties in South Carolina37th highest of 46
- Counties in the United States3,002nd highest of 3,151
Peaks and hills highest inside
- Rosom Hill50 ft
- Raven Hill20 ft
All 7 towns in Dorchester County by typical elevation
- Reevesville110 ft
- St. George96 ft
- Harleyville87 ft
- Grover84 ft
- Summerville59 ft
- Ridgeville53 ft
- North Charleston partly24 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
- Highest and lowest: the highest land cell. Lowest: the lowest land cell; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- 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, −30 ft at 33.2307° N, 80.4551° W, is in such a hollow or patch and is not counted.
- Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it 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).
- Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
- 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 (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 (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones; NOAA tidal surfaces (MHHW). All public domain.