Ridley Township, PA Elevation & Topographic Map
Elevation
190 ft 55 m140 ft 45 m120 ft 35 m70 ft 21 m23 ft 7 m0 ft 0 m
Contours every 100 ft, bold every 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.
- Township area
- Fades everything outside the official township boundaries (US Census).
Elevation Data
Ridley Township sits at about 100 ft (30 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
100 ft 30 m
most residents: 37–120 ft
Lowest
0 ft 0 m
on the southwest side
Highest
190 ft 55 m
on the north side
Average
80 ft 24 m
all land inside township boundaries
Ridley Township spans about 190 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 | 100 ft30 m |
| Highest point Inside township boundaries, on the north side | 190 ft55 m |
| Lowest point Inside township boundaries, on the southwest side | 0 ft0 m |
| Airport (PHL) FAA airport elevation, the highest point of its runways, 3.5 mi east of the township boundaries | 36 ft11 m |
| Average of all land | 80 ft24 m |
Elevation profile, south to north
2.9 mi south to north through the middle of Ridley Township.
Topographic Map
- Location
- Township in Delaware County, Pennsylvania, United States
- Population
- 31,139 2024 est.
- Land area
- 5.1 sq mi + 0.2 sq mi water
- Density
- 6,088 per sq mi
- Coordinates
- 39.8902° N, 75.3271° W
- Time zone
- Eastern UTC−5 / −4
- Landform region
- Coastal Plain
- Drains to
- Atlantic Ocean
- Airport
- Philadelphia International (PHL) 36 ft
- ZIP codes 6
- 19033 19043 19070 19078 19081 19094
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Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- Morton140 ft
- Swarthmore130 ft
- Rutledge130 ft
- Folsom100 ft
- Ridley Township100 ft
- Woodlyn88 ft
- Glenolden87 ft
- Prospect Park82 ft
- Ridley Park80 ft
- Norwood74 ft
- Eddystone20 ft
Rankings by typical elevation
- Towns in Pennsylvania3,509th highest of 3,545
- Towns in Delaware County41st highest of 63
Peaks and hills nearest, by height
- Hunting Hill410 ft
- Osborne Hill380 ft
- Lafayette Hill280 ft
- Georges Hill270 ft
- Lemon Hill140 ft
How we measure
- Typical elevation: the population-weighted median: every 2020 Census block inside the township 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 township 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, −4 ft at 39.8604° N, 75.3226° W, is in such a hollow or patch and is not counted.
- 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.