Delaware County is a compact, densely settled county immediately west of Philadelphia, but its landscape changes quickly from the low Delaware River corridor to rolling uplands around Media and the western townships. Chester, Eddystone, Ridley Park, Trainer, and Marcus Hook line the southern river-and-highway belt, while Yeadon, Lansdowne, Darby, and Collingdale form a tight eastern cluster along the Philadelphia boundary. I-95, I-476, I-495, U.S. 1, PA 3, and PA 252 provide the strongest road references. The four original A3 high-resolution JPG maps can be downloaded from the file box below. High-resolution map files are available for download in the section below.
The county’s streams provide another useful way to organize the map. Darby Creek, Crum Creek, Ridley Creek, and Chester Creek descend generally toward the southeast and eventually reach the Delaware River. Those valleys divide the higher western and northwestern terrain into short ridges, while the Chester-to-Yeadon side remains much lower. The contrast is especially clear when the general, water, and elevation maps are compared.
Table of Contents
Chester and Ridley Park follow the low Delaware River transportation belt
Chester is the strongest southern reference point on the general map. The city sits on the north side of the Delaware River near I-95, while I-495 continues toward Trainer and Marcus Hook near the Delaware state line. Eddystone and Ridley Park lie east of Chester, creating a closely connected riverfront and highway corridor.
The southern edge is unusually flat compared with the western interior. Philadelphia International Airport appears just beyond the county line east of Ridley Park, and the regional road network connects the river communities directly with Philadelphia and Wilmington. Moving only a few miles inland, however, Brookhaven, Swarthmore, and Chester Heights occupy more rolling ground.
Near the county center, U.S. 1 and I-476 cross close to the Delaware County Courthouse, placing the Media area well inland from Chester. PA 252 adds another north-south route through the central county. That separation between the river city and the inland county seat is one of the clearest geographic features of Delaware County.
Yeadon, Lansdowne, Darby, and Collingdale form the tightest settlement cluster
The ranked community map highlights Chester, Yeadon, Lansdowne, Darby, Collingdale, and Brookhaven. The values printed on the supplied graphic are Chester 33,619, Yeadon 12,181, Lansdowne 11,122, Darby 10,687, Collingdale 8,897, and Brookhaven 8,331. These figures explain the ranking used in the map and should not be treated as a substitute for the newest official population estimates.
Chester ranks first by a wide margin, but the densest visual cluster is on the eastern side of the county. Yeadon, Lansdowne, Darby, and Collingdale occupy a very small area immediately beside Philadelphia, with Glenolden and Folcroft continuing the same urban fabric to the south. Municipal boundaries and local roads appear much more tightly packed here than in the western townships.
Brookhaven sits inland north of Chester and therefore represents a different part of the settlement pattern. Swarthmore and Ridley Park are also important nearby centers, while Media is the county seat even though it does not appear among the six ranked places on this graphic. Comparing the city and general maps makes the riverfront, eastern urban cluster, and central inland area easy to separate.
Darby, Crum, Ridley, and Chester creeks divide the county into neighboring valleys
The Delaware River is the largest water feature and forms the southern and southeastern edge near Chester, Eddystone, and Marcus Hook. Several major local creeks descend from the interior toward that river, creating a repeating pattern of valleys across a county that otherwise appears highly urbanized.
Darby Creek drains the eastern side near the Philadelphia boundary. Crum Creek lies farther west, followed by Ridley Creek and Chester Creek, while West Branch Chester Creek joins the latter from the western interior. Their overall southeastward direction divides the county into a sequence of narrow uplands and low corridors.
Springton Reservoir and Crum Creek Reservoir provide the clearest inland water landmarks, with Earles Lake farther north. Brinton Lake and several smaller ponds appear in the western interior, while Marcus Hook Creek reaches the Delaware River near the southwestern corner. The water map remains useful even in the developed east because the creek valleys still shape local geography.
Pennsylvania DCNR describes Ridley Creek State Park as more than 2,606 acres of Delaware County woods and meadows on gently rolling terrain bisected by Ridley Creek. That description matches the western and central map area, where stream valleys and uplands are much more pronounced than along the riverfront. The supplied map is not a flood, depth, navigation, or water-quality product.
Mapped elevation ranges from about -58 to 152 meters
The elevation map reports an actual raster range of roughly -58 to 152 meters and a mean near 70 meters. The lowest green terrain follows the Delaware River and much of the southeastern county, including the Chester, Eddystone, Ridley Park, and eastern suburban side. Higher yellow and brown terrain becomes increasingly common toward the west and northwest.
The negative end of the raster range should not be interpreted as proof that ordinary dry land in the county lies dozens of meters below sea level. Water cells, estuarine surfaces, and edge effects can be included in a digital elevation raster. The map is most useful for comparing relative terrain: the riverfront is low, while the western and northwestern interior is clearly higher.
Darby Creek, Crum Creek, Ridley Creek, and Chester Creek appear as lower green corridors cutting through the rolling interior. Short ridges separate those streams, so Delaware County is more topographically varied than its continuous suburban development may suggest. I-476 and U.S. 1 cross this changing terrain between the river corridor and the higher interior.
The elevation surface is intended for county-wide comparison rather than survey-grade measurement. Parcel, drainage, construction, or engineering work requires authoritative source elevation data or professional surveying.
Media became the county seat after government moved inland from Chester
Delaware County’s official history states that the county separated from Chester County in 1789 and initially retained Chester as its seat of local government. As the interior developed, residents farther north and west objected to the travel distance, and the county seat moved to Media in 1850. The Delaware County Courthouse on the general map provides a clear modern reference for that inland administrative center.
Media occupies rolling ground near U.S. 1, I-476, and PA 252 rather than the flat Delaware River edge. Swarthmore, Brookhaven, and Chester Heights lie to the south and southeast. The fact that the county seat is not in the largest city is therefore tied to geography as well as history: Media is more centrally placed within the county than Chester.
The county history also explains that the riverfront became a major industrial area after government moved to Media. Shipyards and other heavy industries developed along the Delaware River, taking advantage of the same low, accessible waterfront now followed by I-95 and I-495. The modern map still reflects that long-standing separation between river industry and inland administration.
Ridley Creek and Crum Creek preserve rolling green corridors inside a dense metropolitan county
Delaware County is part of the Philadelphia metropolitan area and is heavily developed, yet the central and western creek valleys retain substantial open space. Ridley Creek State Park is the clearest example. Pennsylvania DCNR describes more than 2,606 acres of woods and meadows there, only about 16 miles from center city Philadelphia.
Ridley Creek passes through the park, while Crum Creek lies in the neighboring watershed to the east. Springton Reservoir and Crum Creek Reservoir provide distinct water landmarks in the same broad central area. On the elevation map, these valleys are lower than the surrounding ridges but still sit well above much of the Delaware River corridor.
This pattern helps explain why western Delaware County feels different from the Yeadon–Darby side despite the short distance. The western interior has more relief, larger green spaces, and longer creek valleys, while the east has a much more continuous urban fabric.
The Philadelphia-border communities occupy a low, intensely developed eastern strip
Yeadon, Lansdowne, Darby, Collingdale, Glenolden, and Folcroft occupy a narrow eastern section immediately beside Philadelphia. PA 3 crosses the northern side of this area, while I-95 and airport access dominate the lower edge. Municipal boundaries are small and closely packed, making the road and settlement pattern much denser than in western Delaware County.
Darby Creek provides the clearest natural reference within that urban area. It bends southward through low terrain near Yeadon and Darby before continuing toward the Delaware River system. On the water and elevation maps, the creek valley remains visible even though buildings and local streets dominate the general map.
Four of the six ranked communities—Yeadon, Lansdowne, Darby, and Collingdale—come from this compact eastern strip. Chester remains larger as a single city, but the Philadelphia-border municipalities together form the county’s most continuous urban cluster.
Chester and Marcus Hook show how the Delaware River shaped the county’s industrial edge
The county’s official history describes Chester as the original Delaware County seat after the county was created in 1789. When the seat moved to Media in 1850, the riverfront increasingly became available for industrial development, and Chester and nearby river communities grew around shipbuilding and other heavy industries.
The physical setting is easy to see on the maps. Chester, Eddystone, Trainer, and Marcus Hook occupy low ground beside the Delaware River, while Chester Creek and Marcus Hook Creek empty directly into the larger river. Higher rolling terrain begins only a short distance inland.
Today the same corridor remains important for transportation. I-95 connects Philadelphia and Wilmington, and I-495 continues along the Delaware side near Marcus Hook. Reading the river and highways together is more useful than treating each riverfront municipality as an isolated point.
Choose the map according to the question
The general reference map is the best starting point for roads and communities. It combines Chester, the Media area, Yeadon, Lansdowne, Darby, Brookhaven, Ridley Park, I-95, I-476, I-495, U.S. 1, PA 3, and PA 252 in one view. The ranked community map is cleaner when the goal is to compare settlement size and see how strongly the eastern municipalities cluster together.
The terrain-and-water map is more useful for the Delaware River, Darby Creek, Crum Creek, Ridley Creek, Chester Creek, Springton Reservoir, and Crum Creek Reservoir. The elevation map removes most labels and makes the contrast between the low riverfront and the higher western interior especially easy to see.
For printed handouts, classroom use, regional reference notes, or presentation slides, the A3 high-resolution JPG files in the download archive will remain sharper than enlarged web previews. Pairing the road and elevation maps works well for urban geography and relief, while the community and water maps show how settlement fits around the creek valleys.
Frequently Asked Questions
Should I use Chester or Media as the main Delaware County reference point?
Use Chester for the Delaware River and I-95 corridor, and use Media for the inland county-government area around U.S. 1 and I-476. Chester occupies the low southern waterfront, while Media sits on higher rolling ground near the center of the county.
Why are Yeadon, Lansdowne, Darby, and Collingdale packed so closely together?
They occupy a small, heavily urbanized strip immediately west of Philadelphia. Darby Creek crosses the same low eastern terrain, and municipal boundaries, local roads, and neighborhoods are much more tightly spaced there than in the western part of the county.
Does the negative elevation value mean Delaware County land is far below sea level?
Not necessarily. The mapped raster range includes water and edge cells along the Delaware River and estuary, so negative values should not be treated as parcel-level land elevations. Use the map to compare the low riverfront with higher western terrain, and use authoritative source data for exact elevations.
Map File Information
The download ZIP contains four A3 high-resolution JPG files: the Delaware County general reference map, ranked community map, terrain-and-water map, and elevation map. The original files are larger than the web previews and are better suited to printing, classroom handouts, regional reference work, and presentation slides.
- Included Files: Use only the versions confirmed in the article and supplied images
- File Type: Use the confirmed download contents
- Intended Use: Printing, education, presentations, and map-based projects
Related Maps
Sources and References
- Delaware County official history: county formation, Chester and Media county-seat history, and riverfront development.
- Pennsylvania DCNR – Ridley Creek State Park: official information on Ridley Creek, rolling terrain, woodlands, and meadows.
- U.S. Census Bureau TIGER/Line Shapefiles: county boundaries and transportation geography.
- USGS National Hydrography: rivers, streams, lakes, and reservoir data.
- USGS 3D Elevation Program: elevation data and 3DEP documentation.
Green Map creates custom-edited map images using open geographic data sources such as geoBoundaries, Natural Earth, OpenStreetMap, and government open data. These maps are edited visual materials, not raw data files, and are provided for education, documents, presentations, and graphic reference.
