18015 ZIP Code Profile, Map, Data & Demographics

ZIP Code Type: STANDARD
County: Northampton County
Centroid: Latitude 40.601, Longitude -75.369
Time Zone: Eastern Time Zone (UTC -5 hours)
Observes DST: Yes

ZIP Code 18015 has segments in 2 Counties (Lehigh, Northampton).

Businesses Addresses: 801
PO Box Addresses: 118
Residential Addresses: 12,231

Multi-Family Addresses: 1,486
Single Family Addresses: 10,745

The ZIP Code maps and database are updated 4 times per year.
Database updated: June 1, 2025, Maps updated: May 1, 2024.

Bethlehem, PA 18015 Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	35,206 (100%)
Population in Households	30,698 (87.2%)
Population in Families	22,416 (63.7%)
Population in Group Quarters¹	4,508 (12.8%)
Population Density	1,609
Diversity Index²	80


INCOME
Median Household Income	$60,277
Average Household Income	$91,171
% of Income for Mortgage⁴	36%
Per Capita Income	$31,341
Wealth Index⁵	75
Socioeconomic Status Index⁶	Low (43.3)

HOUSING
Total HU (Housing Units)	13,043 (100%)
Owner Occupied HU	6,114 (46.9%)
Renter Occupied HU	5,912 (45.3%)
Vacant Housing Units	1,017 ( 7.8%)
Median Home Value	$341,772
Average Home Value	$434,739
Housing Affordability Index³	60

HOUSEHOLDS
Total Households	12,026
Average Household Size	2.55
Family Households	7,138
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
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 races 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.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Bethlehem, PA 18015 - Peer Comparisons by Rank and Percentile

The table below compares 18015 to the other 1,696 ZIP Codes in Pennsylvania by rank and percentile using July 1, 2025 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.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	1.02%	0.18%
Households	0.76%	0.35%
Families		0.17%
Median Household Income		1.90%
Per Capita Income		1.92%
Owner Occupied HU		0.48%

Variable Description	Rank	Percentile
Total Population	# 72	96th
Population Density	# 341	80th
Median Household Income	# 1322	22nd
Housing Affordability Index	# 177	10th
Per Capita Income	# 1302	23rd
Diversity Index	# 25	99th

18015 ZIP Code Profile, Map, Data & Demographics

ZIP Code 18015: Basic Data & USPS Preferred City Name

Bethlehem, PA 18015 Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Bethlehem, PA 18015 - Peer Comparisons by Rank and Percentile

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