Allentown, PA GIS Map
Allentown is a city in Lehigh County, Pennsylvania, with a population of about 126,092. The map below shows its location, boundary and surrounding roads, with federal GIS layers you can turn on for the area.
- County
- Lehigh County
- Population
- 126,092
- Elevation
- 343 ft
- Coordinates
- 40.6084, -75.4902
- ZIP codes (8)
- 18101, 18102, 18103, 18104, 18105, 18106 …
- Land area
- 17.6 sq mi
- Time zone
- America/New York
About Allentown, PA
Allentown is a city in eastern Pennsylvania, United States. The county seat of Lehigh County, it is the third-most populous city in Pennsylvania, with a population of 125,845 as of the 2020 census. It is also the most populous city in the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the nation as of 2020.
Source: Wikipedia (CC BY-SA 4.0)
Cities Near Allentown
GIS Data for Allentown, PA
The Allentown map loads live federal GIS layers in your browser, so you can check flood zones, terrain, land cover and district boundaries for any address in Allentown without a separate GIS login. Everything below is drawn from public U.S. government data.
Layers you can turn on
FEMA flood zones
National Flood Hazard Layer — flood insurance rate map zones.
Elevation contours and hillshade
USGS 3DEP terrain, so you can read slope and relief.
Land cover
NLCD land cover classes — forest, developed, wetland, water.
School districts
Census TIGER unified and elementary school district boundaries.
ZIP code and county boundaries
Census TIGER ZCTA and county boundary lines.
Map tools
Measure distance and area
Draw a line or polygon to get length in miles or area in acres.
Sketch and annotate
Add points, lines and shapes on top of the map.
Inspect any point
Click the map to read coordinates, elevation and the layers under your cursor.
Download the map
Save the current view as a PNG image.
Allentown Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
125,976
Households
46,374
Median household income
$55,494
Median age
33.1 years
Median home value
$206,600
Median gross rent
$1,317/mo
Owner-occupied homes
43.2%
Bachelor's degree or higher
19.1%
Below poverty level
21%
Land area
17.6 sq mi
Population density
7,172 / sq mi
County
Allentown Population Growth
Source: U.S. Census Bureau, 2010 Census and Population Estimates Program (Vintage 2024: April 2020 estimates base and July 1, 2024 estimate).
2010 Census
118,032
April 2020 (estimates base)
125,855
July 2024 estimate
127,138
Change 2010-2020
+6.6%
Change 2020-2024
+1.0%
Photos of Allentown
Hover over a photo to see it larger. Tap on mobile.
Photos from Wikimedia Commons, taken in or near Allentown. Credits and licenses are shown in the larger view.
Federal Buildings & Leases in Allentown
GSA-managed federal properties in and around Allentown.
| Property | Address | Status | Sq ft | Lease ends |
|---|---|---|---|---|
| Edward N Cahn Fb-Us CH | 504 W Hamilton St, 18101 | Owned | 76,287 | — |
| Former Eric Theater | 41 N 4th St, 18102 | Leased | 13,740 | Jun 2038 |
| The Butz Corporate Center | 842 Hamilton St, 18101 | Leased | 5,658 | Dec 2034 |
| Saucon Valley Plaza | 3477 Corporate Pkwy, 18034 | Leased | 5,088 | Jan 2031 |
| Hanover Plaza | 961 Marcon Blvd, 18109 | Leased | 4,071 | Jan 2038 |
| Lehigh Valley International Airport | 3311 Airport Rd 3311 Airport Road, 18109 | Leased | 2,106 | Dec 2035 |
Source: U.S. GSA Inventory of Owned and Leased Properties (data.gov), September 2026.
Soils of Allentown
General soil map unit at the city center: Washington-Urban land
Soil Properties
- Drainage class
- Well drained
- Hydrologic soil group
- B (moderate infiltration)
- Available water storage (0–150 cm)
- 25.1 cm
- Typical slope
- 6%
- Flooding frequency
- None
Soil Components
- Washington38%
Alfisols · Ultic Hapludalfs
- Washington20%
Alfisols · Ultic Hapludalfs
- Urban land13%
- Washington10%
Alfisols · Ultic Hapludalfs
- Clarksburg6%
Alfisols · Oxyaquic Fragiudalfs
- Holly3%
Inceptisols · Fluvaquentic Endoaquepts
Source: USDA NRCS U.S. General Soil Map (STATSGO2). General soil map data (1:250,000 scale) is not suitable for site-specific decisions.
Climate of Allentown
30-year averages (1991–2020) from the Allentown Intl Ap, Pa weather station, elevation 390 ft, 3.6 miles from the city center.
Warmest month
Jul · avg high 86°F
Coldest month
Jan · avg low 22°F
Annual precipitation
47.4 in
Annual snowfall
33.1 in
Average Monthly Temperatures (°F)
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 42 | 51 | 63 | 74 | 82 | 86 | 84 | 77 | 66 | 54 | 43 |
| Avg low °F | 22 | 23 | 30 | 40 | 51 | 60 | 65 | 63 | 55 | 44 | 34 | 27 |
| Precip. in | 3.30 | 2.77 | 3.63 | 3.67 | 3.65 | 4.40 | 5.30 | 4.56 | 4.84 | 4.14 | 3.24 | 3.86 |
| Snow in | 9.8 | 10.8 | 6.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.9 | 4.6 |
Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Conditions at the station may differ from other parts of the city.
Natural Hazard Risk in Allentown
FEMA National Risk Index ratings for Lehigh County, compared with all U.S. counties.
Overall risk
Score 93.9 of 100
Expected annual loss
Buildings, population & agriculture
Social vulnerability
Susceptibility to hazard impacts
Community resilience
Ability to prepare & recover
Risk by Hazard
- Cold WaveVery High
- Winter WeatherVery High
- Heat WaveRelatively Moderate
- LightningRelatively High
- Strong WindRelatively High
- Inland FloodingRelatively High
- HurricaneRelatively Moderate
- EarthquakeRelatively Low
- TornadoRelatively Moderate
- LandslideRelatively Low
- Ice StormRelatively Moderate
- DroughtRelatively Moderate
- HailRelatively Low
- WildfireVery Low
- AvalancheVery Low
Source: FEMA National Risk Index (December 2025 release). County-level ratings are relative to other U.S. counties and are not a property-specific assessment.
Allentown FAQ
What county is Allentown in?
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Allentown, Pennsylvania is located in Lehigh County.
What is the population of Allentown?
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Allentown has a population of about 126,092, making it the number 3 of the 48 Pennsylvania cities listed on GIS Map.
What is the elevation of Allentown?
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The elevation of Allentown is approximately 343 feet (105 meters) above sea level at the city center.
What ZIP codes are in Allentown?
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ZIP codes for Allentown include 18101, 18102, 18103, 18104, 18105, 18106, 18109, 18195.
What time zone is Allentown in?
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Allentown is in the Eastern Time zone (America/New York).
How far is Allentown from Harrisburg?
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Allentown is about 77 miles from Harrisburg, the capital of Pennsylvania, in a straight line.
How far is Allentown from Philadelphia?
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Allentown is about 48 miles from Philadelphia, the largest city in Pennsylvania listed on GIS Map, in a straight line.
What cities are near Allentown?
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Cities near Allentown include Bethlehem, PA (6 miles); Easton, PA (15 miles); Kutztown, PA (16 miles); Jim Thorpe, PA (22 miles); Pottstown, PA (26 miles).
Local notes for Allentown, PA
Questions and local knowledge from people who know the area. Every note is read before it appears here.