PlainZIP

Allentown, PA · standard

ZIP Code 18104

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

43,236
723/sq mi
$94,601
Median income
$336,400
Median home value
46.1%
Bachelor's or higher

The verdict

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

Top 23%
household income, US ZIPs
Top 28%
home value, US ZIPs
723
people per sq mi
71%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 18104 against every reporting US ZIP.

ZIP code 18104 is a densely settled ZIP (a standard USPS delivery area) in Allentown, Lehigh County, Pennsylvania, with 43,236 residents across 59.8 square miles, a density of 723 people per square mile, in the New York time zone.

ZIP 18104 lands in the middle-income range, with a median household income of $94,601 (21% above the Pennsylvania average), while per-capita income is $46,691. Local economic indicators show a 8.3% poverty rate alongside 5.9% unemployment. Housing costs here run $336,400 for a typical home value (48% above the state average), with rent averaging $1,637 a month; 71.0% of homes are owner-occupied.

A solid share of residents have a four-year degree: 46.1% of adults hold a bachelor's degree or higher, the median age is 40.6, and the average commute is 22 minutes. To put 18104 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 18104

Top 5 sectors by establishment count in Allentown, PA

Which industries have the most business establishments in ZIP 18104.

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 18104, 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

43,236

Population

59.8

Area (sq mi)

723

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 18104?

40.6

Median Age

47.5%

Male

52.5%

Female

14.9%

Foreign-Born

White 68.2%
African American 7.1%
Asian 7.0%
American Indian or Alaska Native 0.3%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 11.4%
Hispanic or Latino 17.1%

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?

$94,601

Median Household Income

+21% vs state

$46,691

Per Capita Income

8.3%

Poverty Rate

5.9%

Unemployment Rate

21.5 min

Mean Commute Time

How ZIP 18104 ranks nationally

Allentown, PA household income vs. every US ZIP code

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

$94,601 Top 23% higher than 77% 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%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $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 73.5%
Bachelor's Degree or Higher 46.1%

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

What does housing look like?

19,193

Total Housing Units

18,532

Occupied Units

661

Vacant Units

2.44

Avg Household Size

Occupancy Type

Owner 71.0%
Renter 29.0%

$336,400

Median Home Value

+48% vs state

$1,637

Median Rent

1972

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

+7.0%

YoY Change (2024)

266

HPI Index (2000 = 100)

+166%

Total Change Since 2000

Home values in ZIP 18104 have increased 7.0% over the past year (2024). Since 2000, this ZIP has seen +166% cumulative appreciation.

Year Annual Change HPI Index
2020 +4.0% 174
2021 +12.5% 195
2022 +15.3% 225
2023 +10.5% 249
2024 +7.0% 266

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 1,248 business establishments in ZIP 18104, employing approximately 25,626 people with a combined annual payroll of $1,519,653,000.

1,248

Businesses

25,626

Employees

$1.5B

Annual Payroll

17

Industry Sectors

Industry Establishments % of Total
Health care and social assistance 241 19.3%
Professional, scientific, and technical services 154 12.3%
Retail trade 133 10.7%
Accommodation and food services 124 9.9%
Other services (except public administration) 121 9.7%
Finance and insurance 88 7.0%
Construction 80 6.4%
Real estate and rental and leasing 73 5.8%
Administrative and support and waste management and remediation services 59 4.7%
Wholesale trade 48 3.9%
Transportation and warehousing 41 3.3%
Information 20 1.6%
Educational services 19 1.5%
Arts, entertainment, and recreation 19 1.5%
Manufacturing 15 1.2%
Utilities 6 0.5%
Management of companies and enterprises 5 0.4%

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 18104 vs 18105 →

ZIP 18104 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 18104 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 18104 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 18104 ranks #2 of 8 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 2.9 mi
18037 Coplay, PA 7,070 4.9 mi
18102 Allentown, PA 49,779 3.7 mi
18046 East Texas, PA 64 4.4 mi
18106 Allentown, PA 6,889 3.6 mi
18069 Orefield, PA 8,017 3.8 mi
18101 Allentown, PA 3,897 4.1 mi
18052 Whitehall, PA 26,902 3.9 mi
18195 Allentown, PA 0 4.5 mi
18087 Trexlertown, PA 738 4.7 mi

More ZIP Codes in Lehigh County

18102 standard
Allentown, PA
Pop: 49,779
18103 standard
Allentown, PA
Pop: 45,336
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 18104 in? ▼
ZIP code 18104 (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 18104? ▼
ZIP code 18104 in Allentown, PA has a population of 43,236 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 18104? ▼
The median household income in ZIP 18104 is $94,601, which is 24% above the national average of $76,288.
What is the average home value in ZIP 18104? ▼
The median home value in ZIP 18104 is $336,400, which is 21% above the national average of $278,155.
What is the demographic makeup of ZIP 18104? ▼
The largest racial group in ZIP 18104 is White at 68.2%. Hispanic or Latino residents make up 17.1% of the population.
How many businesses are in ZIP code 18104? ▼
ZIP code 18104 has 1,248 business establishments employing approximately 25,626 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 18104? ▼
The top industries by establishment count in ZIP 18104 are: Health care and social assistance (241), Professional, scientific, and technical services (154), Retail trade (133). There are 17 industry sectors represented in total.
How have home values changed in ZIP code 18104? ▼
According to the FHFA House Price Index, home values in ZIP 18104 increased by 7.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 166%. 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 18104? ▼
In ZIP code 18104, 73.5% of residents aged 25+ have a high school diploma or higher, and 46.1% 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 18104? ▼
The mean commute time for workers in ZIP code 18104 is 21.5 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 18104? ▼
In ZIP code 18104, approximately 71.0% of occupied housing units are owner-occupied and 29.0% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 18104? ▼
The poverty rate in ZIP code 18104 is 8.3% 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.