ZIP Code 18103, Pennsylvania
ZIP Code 18103 profile, demographic data, and geographic information.
ZCTA5 18103 is a 5-digit ZIP Code area located in Lehigh County, Pennsylvania. As of official census estimates, it has a reported population of 48,746. The land area covers 17.16 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 48,746 | ±2,105 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 39.1 yrs | ±2.5 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 18,880 | ±801 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 19,775 | ±767 |
| Occupied Housing Units | 18,880 | ±801 |
| Vacant Housing Units | 895 | ±254 |
| Median Home Value | $272,700 | ±$13,562 |
| Median Gross Rent | $1,368 | ±$59 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $72,895 | ±$4,130 |
| Per Capita Income | $40,738 | ±$2,351 |
| Poverty Rate | 10.3% | ±2.1% |
| Population Below Poverty Level | 4,922 | ±1,032 |
| Unemployment Rate | 5.8% | ±1.6% |
| Civilian Labor Force, Employed | 24,454 | ±1,560 |
| Broadband Internet Rate | 90.9% | ±1.7% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 385,655 (2024)
ID: 194489
|
County | Official County Government |
Contact: COUNTY EXECUTIVE
17 S 7TH ST, ALLENTOWN PA 18101-2401
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | 06 | Quakertown, PA | |
| Regular School Nearby | KG-05 | Alburtis, PA | |
| Regular School Nearby | 05-08 | Allentown, PA | |
| Regular School Nearby | KG-05 | Allentown, PA | |
| Regular School Nearby | KG-05 | Bethlehem, PA | |
| Regular School Nearby | KG-04 | Easton, PA | |
| Career and Technical School Nearby | 09-12 | Bethlehem, PA | |
| Regular School Nearby | PK-03 | Topton, PA | |
| Regular School Nearby | 09-12 | Mertztown, PA | |
| Regular School Nearby | 04-08 | Topton, PA |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Cedar Crest College
|
College | 1.8 mi away | 100 College Drive, Allentown, PA, 18104-6196 |
6106064666
|
|
ALLENTOWN PUBLIC LIBRARY
|
Library | 1.9 mi away | 1210 HAMILTON ST, ALLENTOWN, PA, 18102 |
(610) 820-2400
|
|
Muhlenberg College
|
College | 2.0 mi away | 2400 Chew Street, Allentown, PA, 18104 |
4846643100
|
|
EMMAUS PUBLIC LIBRARY
|
Library | 2.2 mi away | 11 EAST MAIN ST, EMMAUS, PA, 18049 |
(610) 965-9284
|
|
Metro Beauty Academy
|
College Vocational | 3.5 mi away | 4977 Medical Center Circle, Allentown, PA, 18106 |
6103986227
|
|
LOWER MACUNGIE LIBRARY
|
Library | 4.5 mi away | 3450 BROOKSIDE ROAD, MACUNGIE, PA, 18062 |
(610) 966-6864
|
|
Empire Beauty School-Lehigh Valley
|
College Vocational | 4.0 mi away | 1634 MacArthur Rd, Whitehall, PA, 18052 |
8009204593
|
|
PARKLAND COMMUNITY LIBRARY
|
Library | 4.8 mi away | 4422 WALBERT AVENUE, ALLENTOWN, PA, 18104 |
(610) 398-1333
|
|
The Beauty Institute
|
College Vocational | 4.1 mi away | 153 Lehigh Valley Mall, Whitehall, PA, 18052 |
732320219490890
|
|
WHITEHALL TOWNSHIP PUBLIC LIBRARY
|
Library | 5.5 mi away | 3700 MECHANICSVILLE RD, WHITEHALL, PA, 18052 |
(610) 432-4339
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at ALLENTOWN INTL AP, PA US, located 5.8 miles from ZCTA5 18103. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 38.4° | 21.8° | 30.1° | 3.30" | 9.8" |
| February | 41.6° | 23.2° | 32.4° | 2.77" | 10.8" |
| March | 50.8° | 30.5° | 40.7° | 3.63" | 6.3" |
| April | 63.4° | 40.3° | 51.8° | 3.67" | 0.5" |
| May | 73.5° | 50.6° | 62.0° | 3.65" | 0.0" |
| June | 81.9° | 59.9° | 70.9° | 4.40" | 0.0" |
| July | 86.4° | 64.7° | 75.6° | 5.30" | 0.0" |
| August | 84.3° | 62.8° | 73.6° | 4.56" | 0.0" |
| September | 77.4° | 55.2° | 66.3° | 4.84" | 0.0" |
| October | 65.5° | 43.8° | 54.6° | 4.14" | 0.2" |
| November | 53.8° | 34.1° | 43.9° | 3.24" | 0.9" |
| December | 43.1° | 26.8° | 35.0° | 3.86" | 4.6" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Dorneyville CDP | CDP | 1.6 mi | — |
| Allentown city | City | 1.6 mi | — |
| Emmaus borough | Borough | 2.6 mi | — |
| Cetronia CDP | CDP | 3.0 mi | — |
| Wescosville CDP | CDP | 3.2 mi | — |
| Fullerton CDP | CDP | 4.1 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 18103. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.