🇺🇸 United States ZIP Code

STANDARD

18018

Bethlehem

ZIP Code 18018 is a standard zip code serving Bethlehem, Bethlehem, Pennsylvania (PA), in Northampton County, United States. It has an estimated population of 32,413 with a median household income of $46,567. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Pennsylvania (PA)
County: Northampton
City: Bethlehem
Timezone: America/New_York

Coordinates

Latitude: 40.627800
Longitude: -75.392800

Geographic Details

Land Area: 5.15 mi²
Water Area: 0.14 mi²
Population Density: 6291.0 people per mi² (95th percentile)
Bounding Box: 40.648717°N, 40.612196°S, -75.358334°E, -75.430127°W

With 32,413 residents spread across 5.15 square miles, this area has a population density of 6291.0 people per square mile.

Demographics

32,413

Population

90th percentile

$46,567

Median Income

45th percentile

$164,800

Median Home Value

65th percentile

5.15 mi²

Land Area

The median household income in 18018 is $46,567, and the median home value is $164,800.

Housing

14,698

Total Units

13,893

Occupied Units

94.5%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Bethlehem, PA.

18015

Bethlehem

18016

Bethlehem

18017

Bethlehem

18020

Bethlehem

18025

Bethlehem

Similar ZIP Codes in Pennsylvania

ZIP codes with similar median household income in Pennsylvania.

16803

State College

$50,846

15535

Clearville

$41,061

16350

Sugar Grove

$47,656

15445

Hopwood

$49,298

18610

Blakeslee

$52,468

18336

Matamoras

$50,536

16327

Guys Mills

$49,291

16127

Grove City

$49,222

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.