Residential delivery area · Pennsylvania
ZIP Code 18102: Allentown, PA
ZIP code 18102 is in Allentown, Pennsylvania, entirely in Lehigh County (Census 2020 ZIP-county file). About 51,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Allentown's 7 residential ZIP codes. Median household income is $43,085 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Allentown · 7 residential ZIPs
- County
- Lehigh County
- Census places
- Allentown
- Metro area
- Allentown-Bethlehem-Easton, PA-NJ
- House district
- PA-7 119th Congress
- State
- Pennsylvania
- Time zone
- Eastern
- Land area
- 3.0 sq mi · 17,103 people per sq mi
- PO Box ZIPs
- 18105 also use the name Allentown
Where is ZIP code 18102?
18102 centers on 40.608°, -75.476° and covers 3.0 square miles of land plus 0.1 of water. It borders 5 ZIP codes: 18101, 18109, 18103, 18052, 18104.
The map draws ZIP code areas only. For the streets inside 18102, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 18102 compare with the rest of Allentown?
| Measure | 18102 | In Allentown | In Lehigh County | In PA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 51,001 | 1st of 7 | 1st of 35 | 20th of 1,833 |
| Median household income | $43k | 6th of 6 | 27th of 27 | 987th of 1,015 |
| Median home value | $163k | 5th of 5 | 28th of 28 | 791st of 1,069 |
Its median household income is higher than in 8% of U.S. residential ZIP codes, and it is denser than 99% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 18102?
The 2020 Census counted 51,567 people in 18102; the ACS, which samples households over 2020-2024, estimates 51,001. Between the 2010 and 2020 censuses its population grew 3.6% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 51,001
- 2020 Census count
- 51,567+3.6% since 2010 (49,779)
- Households
- 17,289
- Median age
- 31.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 18102?
Of the 51,001 people the ACS estimates in 18102, 29.1% are under 18 and 10.9% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (71.2%), then White (not Hispanic) (16.2%).
- Under 1829.1%
- 18 to 6459.9%
- 65 and older10.9%
- Hispanic or Latino71.2%
- White, not Hispanic16.2%
- Black, not Hispanic9.3%
- Other or two or more3.1%
- Asian, not Hispanic0.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 18102 earn?
Median household income is $43,085 (ACS 2020-2024), the 27th highest of the 27 ranked ZIP codes in Lehigh County. It is not measurably different from 2015-2019 ($41,299 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $43,085
- Income per person
- $19,885
- Below the poverty line
- 29.2%
- Unemployed (of the labor force)
- 10.9%
- Adults 25+ with a bachelor's degree
- 11.6%
- Adjusted gross income per tax return, 2022
- $33,76423,410 returns; wages 90% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 18102?
FHFA's house price index for 18102, built from repeat sales and appraisals of the same homes, rose 218% from 2015 to 2025 and rose 95% from 2020 to 2025, and moved +7.7% in 2025.
- Median home value (owners' estimate)
- $163,400
- Median gross rent
- $1,248
- Homes owned by their occupants
- 32.1%
- Housing units
- 18,849
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 18102?
588 business establishments had a location in this ZIP code in 2023, 44 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade108
- Health care and social assistance91
- Other services (except public administration)90
- Accommodation and food services49
- Professional, scientific, and technical services42
- Construction37
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 18102?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 18101 | Allentown | 6,120 | $45k | 0.5 mi |
| 18109 | Allentown | 18,446 | $58k | 2.6 mi |
| 18103 | Allentown | 48,746 | $73k | 2.7 mi |
| 18052 | Whitehall | 29,451 | $76k | 3.7 mi |
| 18104 | Allentown | 48,683 | $95k | 3.7 mi |
| 18032 | Catasauqua | 9,555 | $81k | 3.4 mi (near) |
| 18018 | Bethlehem | 32,965 | $75k | 4.4 mi (near) |
| 18034 | Center Valley | 9,209 | $153k | 5.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.