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Pennsylvania ZIP Codes
Mercer County
West Middlesex, PA
16159
16159 ZIP Code — West Middlesex, PA
Mercer County, Pennsylvania
ZIP code 16159 is located in
West Middlesex ,
Pennsylvania ,
within Mercer County .
It covers approximately 28.07 square miles and serves a population of
4,616 residents.
This is a standard ZIP code in the Eastern (ET) timezone,
served by area code 724 .
About ZIP code 16159
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1960s, giving the area an established character. Median home value is $157,400. Owner-occupancy is high at 79%, well above the national average.
Median household income is $64,294. 48% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is sales and office, with education and healthcare as the leading industry. The average commute of 19 minutes is near the national average.
Educational attainment is near the national average, with 22% of residents holding a bachelor's degree or higher.
Overall, ZIP code 16159 reflects a community defined by high homeownership and a significant Social Security-dependent population.
16159 ZIP code map
View map of 16159
Cities in ZIP code 16159
Below are the cities the US Postal Service accepts for ZIP code 16159. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 05/2026
Population
Total population
4,616
Population density
164 / sq mi
State FIPS
42
County FIPS
085
Geography
Land area
28.07 sq mi
Water area
0.08 sq mi
Latitude
41.1533
Longitude
-80.4484
Timezone
Eastern (ET)
Area code
724
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
42.2%
49.8%
39.8%
$50k – $100k
42.0%
31.4%
30.8%
$100k – $200k
13.8%
16.3%
22.4%
Over $200k
2.0%
2.5%
7.1%
Demographics & statistics
$64,294
Median household income
$157,400
Median home value
21.5%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 754 16.3% 18 and over 3,862 83.7% 65 and over 1,442 31.2% Median age 54.8 years
Race & ethnicity
Black or African American
1.6%
American Indian / Alaska Native
0.2%
Group Count % White 4,427 94.9% Black or African American 74 1.6% Hispanic or Latino 48 1% Two or more races 45 1% Other race 39 0.8% Asian 22 0.5% American Indian / Alaska Native 9 0.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
42.2%
49.8%
39.8%
$50k – $100k
42.0%
31.4%
30.8%
$100k – $200k
13.8%
16.3%
22.4%
Over $200k
2.0%
2.5%
7.1%
Range % of households Under $10k 4.7% $10k–$15k 3.1% $15k–$25k 5.6% $25k–$35k 11.2% $35k–$50k 10.4% $50k–$75k 21.5% $75k–$100k 14.3% $100k–$150k 22.3% $150k–$200k 3.9% $200k+ 3.1% Median income $64,294
Housing
Housing overview
Metric Value Median home value $157,400 Median rent / month $747 Owner occupied 79.2% Renter occupied 20.8% Vacant 7.8% Single-family detached 75.3% Large apartment buildings 0.0% Mobile homes 16.1% Median rooms 6.2 Avg household size (owned) 2.18
Year built
Era % 2020 or later 0.1% 2010–2019 0.3% 2000–2009 4.0% 1990–1999 4.7% 1980–1989 15.4% 1970–1979 14.6% 1960–1969 17.9% 1950–1959 17.2% 1940–1949 9.8% 1939 or earlier 16.0%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 2.2% 2 bedrooms 27.7% 3 bedrooms 52.4% 4 bedrooms 14.1% 5+ bedrooms 3.6%
Vehicles per household
Vehicles % of households No vehicle 5.9% 1 vehicle 35.9% 2 vehicles 38.5% 3 or more 19.8%
Heating fuel
Fuel type % Utility gas 69.5% Electricity 13.0% Propane / LP gas 5.3% Fuel oil 10.3% Wood 1.9%
Households & families
Household type Count % Married-couple family 1,077 49.5% Cohabiting couple 30 1.4% Male householder, no spouse 393 18.1% Female householder, no spouse 677 31.1% Households with children under 18 452 20.8% Households with seniors (65+) 1,016 46.7% Average household size 2.12
Marital status
Status Male Female Never married 17.8% 14.9% Married 60.3% 54.2% Separated 3.7% 2.3% Widowed 5.6% 19.6% Divorced 12.6% 9.1%
Education
Some college, no degree
16.2%
Graduate / professional
9.1%
Metric % HS diploma or higher 90.9% Bachelor's or higher 21.5%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 33 4.8% Kindergarten 93 13.5% Elementary school 281 40.7% High school 130 18.8% College / grad school 153 22.2%
Employment
Industry of employment
Education & healthcare
33.4%
Transportation & utilities
10.4%
Public administration
6.1%
Professional & management
4.9%
Arts, food & hospitality
3.0%
Finance & real estate
2.6%
Agriculture & mining
0.9%
Occupation
Category % Management, business & arts 25.7% Service 15.3% Sales & office 28.2% Natural resources & construction 9.4% Production & transportation 21.5%
Employment type
Type % Private sector 77.5% Government 19.4% Self-employed 3.2% Unpaid family workers 0.0%
Commute
Method % Drive alone 82.5% Carpool 11.3% Public transit 0.0% Walk 2.4% Work from home 2.2% Other means 1.6% Avg commute (minutes) 18.7
Poverty
Married-couple families
3.7%
Female-led households
26.9%
Income support
Source % of households Social Security 48.0% Retirement income 41.4% Supplemental Security 8.5% Cash public assistance 2.1% Food stamps / SNAP 12.8%
Health indicators
Condition % Obesity 32.0% High blood pressure 33.3% High cholesterol 33.7% Diabetes 10.1% Heart disease 7.4% Stroke 3.1% Asthma 9.8% Arthritis 30.5% Kidney disease 2.9% Pulmonary disease 7.7% Cancer 7.6%
Behavior / access % Smoking 19.3% Binge drinking 18.1% No physical activity 23.0% Less than 7 hrs sleep 36.5% Depression 22.1% Fair or poor health 13.9% Poor mental health 14.9% Poor physical health 10.8% No health insurance 9.8% Visited doctor (checkup) 79.6% Visited dentist 65.9% Cholesterol screening 90.3% Teeth loss 14.4%
Veterans & disability
Veterans Count % Civilian veterans 368 9.6%
Disability % Any disability 21.2% Under 18 5.2% 18–64 years 16.3% 65 and over 37.5%
Health insurance coverage
Type % Private insurance 77.0% Public insurance 45.3% No insurance 2.6% Uninsured under 19 3.2%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 4,464 96.7% Spanish 16 0.4% Other Indo-European 13 0.3% Asian & Pacific Islander 3 0.1% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 4,561 98.8% Born in same state 4,561 98.8% Born in different state 3,676 79.6% Foreign born 0 0.0% Naturalized citizen 55 1.2% Not a US citizen 50 90.9%
Ancestry
Ancestry Count % Italian 1,008 21.8% Arab 501 10.9% French 419 9.1%
Ancestry Count % English 101 2.2% Irish 78 1.7%
Technology access
Metric % of households Computer access 47.2% Internet access 90.4%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 16159
What city is ZIP code 16159 in?
ZIP code 16159 is primarily assigned to West Middlesex, Pennsylvania.
What county is ZIP code 16159 in?
ZIP code 16159 falls within Mercer County, Pennsylvania.
Does ZIP code 16159 have an older population?
31% of residents in ZIP code 16159 are 65 or older, above the national average of ~17%.
Does ZIP code 16159 have a large retiree population?
48% of households in ZIP code 16159 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 16159 have a large veteran population?
10% of civilians in ZIP code 16159 are veterans, above the national average of ~7%.
What is the typical home value in ZIP code 16159?
The median home value in ZIP code 16159 is $157,400.
What timezone is ZIP code 16159 in?
ZIP code 16159 observes the EST timezone.
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