ZIP Code Tabulation Area · Pennsylvania

ZIP Code 18103: Allentown, PA

ZIP Code 18103 (Allentown, Lehigh County, Pennsylvania) has an estimated 48,746 residents in 18,880 households. The median household income is $72,895, the median home value is $272,700 and the median gross rent is $1,368/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

48,746

Margin of error ±2,105

Median household income

$72,895

Margin of error ±$4,130

Median home value

$272,700

Margin of error ±$13,562

Median gross rent

$1,368/mo

Margin of error ±$59

Median age

39.1 yrs

Margin of error ±2.5 yrs

Mean travel time to work

24.5 min

Margin of error ±3.0 min

How ZIP 18103 compares with Pennsylvania and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 1810339.1 yrsPennsylvania40.9 yrsUnited States38.9 yrs

Median household income

ZIP 18103$72,895Pennsylvania$77,971United States$80,734

Per capita income

ZIP 18103$40,738Pennsylvania$44,355United States$44,673

Poverty rate

ZIP 1810310.3%Pennsylvania11.7%United States12.5%

Unemployment rate

ZIP 181035.8%Pennsylvania5.3%United States5.2%

Bachelor's degree or higher

ZIP 1810327.6%Pennsylvania35.2%United States35.7%

Median home value

ZIP 18103$272,700Pennsylvania$254,500United States$332,700

Median gross rent

ZIP 18103$1,368/moPennsylvania$1,209/moUnited States$1,413/mo

Owner-occupied homes

ZIP 1810363.1%Pennsylvania69.3%United States65.2%

Mean travel time to work

ZIP 1810324.5 minPennsylvania26.3 minUnited States26.4 min

Worked from home

ZIP 181038.8%Pennsylvania15.6%United States15.1%

All figures for ZIP 18103

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 18103 — ACS 2020–2024 5-year estimates
MeasureZIP 18103Margin of errorPennsylvaniaUnited States
Total population48,746±2,10513,018,639334,922,499
Median age39.1 yrs±2.5 yrs40.9 yrs38.9 yrs
Households18,880±8015,274,853129,227,496
Median household income$72,895±$4,130$77,971$80,734
Per capita income$40,738±$2,351$44,355$44,673
Poverty rate10.3%±2.1 pts11.7%12.5%
Unemployment rate5.8%±1.6 pts5.3%5.2%
Bachelor's degree or higher27.6%±2.4 pts35.2%35.7%
Median home value$272,700±$13,562$254,500$332,700
Median gross rent$1,368/mo±$59$1,209/mo$1,413/mo
Owner-occupied homes63.1%±2.8 pts69.3%65.2%
Mean travel time to work24.5 min±3.0 min26.3 min26.4 min
Worked from home8.8%±1.5 pts15.6%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 18103
GroupZIP 18103PennsylvaniaUnited States
White alone, not Hispanic or Latino45.2%73.0%57.4%
Black or African American alone, not Hispanic or Latino6.7%10.3%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.0%0.1%0.5%
Asian alone, not Hispanic or Latino3.6%3.8%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.0%0.2%
Some other race alone, not Hispanic or Latino1.0%0.5%0.6%
Two or more races, not Hispanic or Latino2.8%3.6%4.3%
Hispanic or Latino (of any race)40.6%8.7%19.3%

Where ZIP 18103 is

State
Pennsylvania
Main county
Lehigh County
Largest overlapping place
Allentown (40% of the ZIP's land area)
Land area
17.16 sq mi· about 2,841 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Lehigh County

18032 Catasauqua, PA18034 Lehigh County, PA18036 Lehigh County, PA18037 Lehigh County, PA18046 Lehigh County, PA18049 Lehigh County, PA18051 Lehigh County, PA18052 Fullerton, PA18053 Lehigh County, PA18059 Laurys Station, PA18062 Lehigh County, PA18065 Lehigh County, PA18066 Lehigh County, PA18069 Lehigh County, PA18078 Lehigh County, PA18079 Slatedale, PA18080 Lehigh County, PA18087 Trexlertown, PA18092 Lehigh County, PA18101 Allentown, PA18102 Allentown, PA18104 Lehigh County, PA18106 Lehigh County, PA18109 Allentown, PA

See every ZIP code in Pennsylvania, or compare ZIP 18103 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.