Allentown, PA 18109 ZIP Code Profile

Related Place Profiles:
Allentown, PA

ZIP Code 18109: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Allentown, PA 18109

  • ZIP Code Type: STANDARD
  • County: Lehigh County
  • Centroid: Latitude 40.581, Longitude -75.472
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

ZIP Code 18109 has segments in 2 Counties (Lehigh, Northampton).

  • Businesses Addresses: 1,118
  • PO Box Addresses: 210
  • Residential Addresses: 7,288
    • Multi-Family Addresses: 917
    • Single Family Addresses: 6,371

The ZIP Code maps and database are updated 4 times per year.
Database updated: August 1, 2018, Maps updated: August 1, 2018.

Jump to... (On This Page!)
  1. 18109 2018 Demographic Data
  2. Growth Rates for 18109 (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Pennsylvania Research Tools (Easy Tools & Current Data)
  3. Pennsylvania Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Allentown, PA 18109 Data & Demographics (As of July 1, 2018)


Total Population 18,113
Population in Households 17,994
Population in Familes 14,004
Population in Group Qrtrs 119
Population Density2 2,146
Diversity Index3 83


Median Household Income $43,630
Average Household Income $54,502
Per Capita Income $21,276


Total Housing Units 7,576 (100%)
Owner Occupied HU 3,522 (46.5%)
Renter Occupied HU 3,501 (46.2%)
Vacant Housing Units 553 ( 7.3%)
Median Home Value $151,205
Average Home Value $166,745


Total Households 7,023
Average Household Size 2.56
Family Households 4,437
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2018 2018-2023
Population 0.82% 0.69%
Households 0.66% 0.59%
Families 0.49% 0.47%
Median Household Income   2.46%
Per Capita Income   2.47%

Allentown, PA 18109 - Peer Comparisons by Rank and Percentile

The table below compares 18109 to the other 1,675 ZIP Codes in Pennsylvania by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 230 86th
Population Density # 258 85th
Diversity Index # 15 99th
Median Household Income # 1330 21st
Per Capita Income # 1490 11th

Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.

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