ZIP Code Tabulation Area · Pennsylvania

ZIP Code 18104: Lehigh County, PA

ZIP Code 18104 (Lehigh County, Pennsylvania) has an estimated 48,683 residents in 18,532 households. The median household income is $94,601, the median home value is $336,400 and the median gross rent is $1,637/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

48,683

Margin of error ±1,582

Median household income

$94,601

Margin of error ±$6,014

Median home value

$336,400

Margin of error ±$11,364

Median gross rent

$1,637/mo

Margin of error ±$89

Median age

40.6 yrs

Margin of error ±1.6 yrs

Mean travel time to work

21.5 min

Margin of error ±2.2 min

How ZIP 18104 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 1810440.6 yrsPennsylvania40.9 yrsUnited States38.9 yrs

Median household income

ZIP 18104$94,601Pennsylvania$77,971United States$80,734

Per capita income

ZIP 18104$46,691Pennsylvania$44,355United States$44,673

Poverty rate

ZIP 181048.3%Pennsylvania11.7%United States12.5%

Unemployment rate

ZIP 181045.9%Pennsylvania5.3%United States5.2%

Bachelor's degree or higher

ZIP 1810446.1%Pennsylvania35.2%United States35.7%

Median home value

ZIP 18104$336,400Pennsylvania$254,500United States$332,700

Median gross rent

ZIP 18104$1,637/moPennsylvania$1,209/moUnited States$1,413/mo

Owner-occupied homes

ZIP 1810471.0%Pennsylvania69.3%United States65.2%

Mean travel time to work

ZIP 1810421.5 minPennsylvania26.3 minUnited States26.4 min

Worked from home

ZIP 1810419.7%Pennsylvania15.6%United States15.1%

All figures for ZIP 18104

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 18104 — ACS 2020–2024 5-year estimates
MeasureZIP 18104Margin of errorPennsylvaniaUnited States
Total population48,683±1,58213,018,639334,922,499
Median age40.6 yrs±1.6 yrs40.9 yrs38.9 yrs
Households18,532±5805,274,853129,227,496
Median household income$94,601±$6,014$77,971$80,734
Per capita income$46,691±$2,124$44,355$44,673
Poverty rate8.3%±1.9 pts11.7%12.5%
Unemployment rate5.9%±1.2 pts5.3%5.2%
Bachelor's degree or higher46.1%±2.8 pts35.2%35.7%
Median home value$336,400±$11,364$254,500$332,700
Median gross rent$1,637/mo±$89$1,209/mo$1,413/mo
Owner-occupied homes71.0%±3.1 pts69.3%65.2%
Mean travel time to work21.5 min±2.2 min26.3 min26.4 min
Worked from home19.7%±2.5 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 18104
GroupZIP 18104PennsylvaniaUnited States
White alone, not Hispanic or Latino66.1%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 Latino0.1%0.1%0.5%
Asian alone, not Hispanic or Latino7.0%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 Latino0.3%0.5%0.6%
Two or more races, not Hispanic or Latino2.6%3.6%4.3%
Hispanic or Latino (of any race)17.1%8.7%19.3%

Where ZIP 18104 is

State
Pennsylvania
Main county
Lehigh County
Largest overlapping place
Allentown (17% of the ZIP's land area)
Land area
22.95 sq mi· about 2,121 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, PA18103 Allentown, PA18106 Lehigh County, PA18109 Allentown, PA

See every ZIP code in Pennsylvania, or compare ZIP 18104 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.