PlainZIP

Allentown, PA · standard

ZIP Code 18103

Lehigh County, Pennsylvania - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

45,336
994/sq mi
$72,895
Median income
$272,700
Median home value
27.6%
Bachelor's or higher

The verdict

Allentown pairs an above-median household income with above-median home values, in a low-density, homeowner-dominated area.

Top 49%
household income, US ZIPs
Top 38%
home value, US ZIPs
994
people per sq mi
63%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 18103 against every reporting US ZIP.

ZIP code 18103 is a densely settled ZIP (a standard USPS delivery area) in Allentown, Lehigh County, Pennsylvania, with 45,336 residents across 45.6 square miles, a density of 994 people per square mile, in the New York time zone.

ZIP 18103 lands in the middle-income range, with a median household income of $72,895 (6% below the Pennsylvania average), while per-capita income is $40,738. The poverty rate stands at 10.3% and the unemployment rate at 5.8%. Median home value sits at $272,700 (20% above the state average), median rent at $1,368 a month, and owner-occupancy at 63.1%.

Educational attainment sits below the national norm: 27.6% of adults hold a bachelor's degree or higher, the median age is 39.1, and the average commute is 25 minutes. To put 18103 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Lehigh County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 18103

Top 5 sectors by establishment count in Allentown, PA

Which industries have the most business establishments in ZIP 18103.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 18103, Allentown, PA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

45,336

Population

45.6

Area (sq mi)

994

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 18103?

39.1

Median Age

49.4%

Male

50.6%

Female

20.4%

Foreign-Born

White 48.9%
African American 7.5%
Asian 3.7%
American Indian or Alaska Native 1.4%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 16.5%
Hispanic or Latino 40.6%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$72,895

Median Household Income

-6% vs state

$40,738

Per Capita Income

10.3%

Poverty Rate

5.8%

Unemployment Rate

24.5 min

Mean Commute Time

How ZIP 18103 ranks nationally

Allentown, PA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$72,895 Top 49% higher than 51% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 62.6%
Bachelor's Degree or Higher 27.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

19,775

Total Housing Units

18,880

Occupied Units

895

Vacant Units

2.54

Avg Household Size

Occupancy Type

Owner 63.1%
Renter 36.9%

$272,700

Median Home Value

+20% vs state

$1,368

Median Rent

1964

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+2.5%

YoY Change (2024)

268

HPI Index (2000 = 100)

+168%

Total Change Since 2000

Home values in ZIP 18103 have increased 2.5% over the past year (2024). Since 2000, this ZIP has seen +168% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.3% 178
2021 +14.1% 204
2022 +17.8% 240
2023 +9.0% 262
2024 +2.5% 268

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 1,044 business establishments in ZIP 18103, employing approximately 28,576 people with a combined annual payroll of $1,801,825,000.

1,044

Businesses

28,576

Employees

$1.8B

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Health care and social assistance 226 21.6%
Retail trade 127 12.2%
Other services (except public administration) 122 11.7%
Accommodation and food services 97 9.3%
Professional, scientific, and technical services 67 6.4%
Construction 64 6.1%
Administrative and support and waste management and remediation services 59 5.7%
Transportation and warehousing 57 5.5%
Finance and insurance 57 5.5%
Real estate and rental and leasing 45 4.3%
Wholesale trade 41 3.9%
Manufacturing 28 2.7%
Arts, entertainment, and recreation 16 1.5%
Information 14 1.3%
Management of companies and enterprises 12 1.1%
Educational services 9 0.9%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 18103 vs 18105 →

ZIP 18103 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 18103 ranks #2 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 18103 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 18103 ranks #6 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
18105 Allentown, PA 12 2.2 mi
18102 Allentown, PA 49,779 2.6 mi
18101 Allentown, PA 3,897 2.3 mi
18049 Emmaus, PA 17,341 3.8 mi
18034 Center Valley, PA 8,256 3.9 mi
18046 East Texas, PA 64 4.4 mi
18032 Catasauqua, PA 9,285 6.0 mi
18104 Allentown, PA 43,236 4.4 mi
18109 Allentown, PA 16,932 5.1 mi
18052 Whitehall, PA 26,902 6.1 mi

More ZIP Codes in Lehigh County

18102 standard
Allentown, PA
Pop: 49,779
18104 standard
Allentown, PA
Pop: 43,236
18018 standard
Bethlehem, PA
Pop: 32,413
18052 standard
Whitehall, PA
Pop: 26,902
18062 standard
Macungie, PA
Pop: 24,351
18049 standard
Emmaus, PA
Pop: 17,341

Related Areas

Lehigh County Allentown, PA Pennsylvania

Frequently Asked Questions

What county is ZIP code 18103 in? ▼
ZIP code 18103 (Allentown) is located in Lehigh County, Pennsylvania. Lehigh County contains multiple ZIP codes, see the full list at /counties/lehigh-pa.
What is the population of ZIP code 18103? ▼
ZIP code 18103 in Allentown, PA has a population of 45,336 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 18103? ▼
The median household income in ZIP 18103 is $72,895, which is 4% below the national average of $76,288.
What is the average home value in ZIP 18103? ▼
The median home value in ZIP 18103 is $272,700, which is 2% below the national average of $278,155.
What is the demographic makeup of ZIP 18103? ▼
The largest racial group in ZIP 18103 is White at 48.9%. Hispanic or Latino residents make up 40.6% of the population.
How many businesses are in ZIP code 18103? ▼
ZIP code 18103 has 1,044 business establishments employing approximately 28,576 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 18103? ▼
The top industries by establishment count in ZIP 18103 are: Health care and social assistance (226), Retail trade (127), Other services (except public administration) (122). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 18103? ▼
According to the FHFA House Price Index, home values in ZIP 18103 increased by 2.5% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 168%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 18103? ▼
In ZIP code 18103, 62.6% of residents aged 25+ have a high school diploma or higher, and 27.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 18103? ▼
The mean commute time for workers in ZIP code 18103 is 24.5 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 18103? ▼
In ZIP code 18103, approximately 63.1% of occupied housing units are owner-occupied and 36.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 18103? ▼
The poverty rate in ZIP code 18103 is 10.3% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.