15551 ZIP Code — Markleton, PA

Somerset County, Pennsylvania

ZIP code 15551 is located in Markleton, Pennsylvania, within Somerset County. It covers approximately 24.72 square miles and serves a population of 550 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 814.

About ZIP code 15551

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $161,800. Owner-occupancy is high at 82%, well above the national average.

Median household income is $65,000. 45% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is natural resources, construction, and trades, with construction as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 11% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (22%) compared to national benchmarks.

Notable community characteristics include a notable veteran presence at 11% of civilians, above the national average of 7%.

Overall, ZIP code 15551 reflects a community defined by a trades-oriented workforce, a strong veteran community, high homeownership, and a significant Social Security-dependent population.

550

population

24.72

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

15551 ZIP code map

Cities in ZIP code 15551

Below are the cities the US Postal Service accepts for ZIP code 15551. Using any city not on this list may result in mail delivery delays.

City	Status
Markleton	Preferred

Nearby ZIP codes

15557 Rockwood (3.3 mi) 15424 Confluence (5.2 mi) 15540 Fort Hill (6.9 mi) 15542 Garrett (9.4 mi) 15464 Mill Run (9.5 mi) 15411 Addison (10 mi) 15622 Champion (10.5 mi) 15469 Normalville (11.5 mi) 15562 Springs (12.4 mi) 15501 Somerset (12.5 mi) 15510 Somerset (12.6 mi) 15558 Salisbury (13.1 mi)

Demographics updated 05/2026

Population
Total population	550
Population density	22 / sq mi
State FIPS	42
County FIPS	111

Geography
Land area	24.72 sq mi
Water area	0.00 sq mi
Latitude	39.8896
Longitude	-79.2595
Timezone	Eastern (ET)
Area code	814

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.7%	48.8%	39.8%
$50k – $100k	40.8%	33.1%	30.8%
$100k – $200k	14.2%	15.4%	22.4%
Over $200k	2.2%	2.8%	7.1%

Demographics & statistics

550

Population

People per sq mi

52.2

Median age

$65,000

Median household income

$32,204

Per capita income

$161,800

Median home value

$675

Median monthly rent

82.1%

Home ownership

9.3%

Poverty rate

3.9%

Unemployment

280

Housing units

11.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	118	21.5%
18 and over	432	78.5%
65 and over	157	28.5%
Median age	52.2 years

Race & ethnicity

White 96.2%

Two or more races 2.1%

Hispanic or Latino 1.6%

Group	Count	%
White	538	96.2%
Two or more races	12	2.1%
Hispanic or Latino	9	1.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.7%	48.8%	39.8%
$50k – $100k	40.8%	33.1%	30.8%
$100k – $200k	14.2%	15.4%	22.4%
Over $200k	2.2%	2.8%	7.1%

Under $10k 4.0%

$10k–$15k 4.5%

$15k–$25k 5.4%

$25k–$35k 9.4%

$35k–$50k 14.3%

$50k–$75k 27.2%

$75k–$100k 7.6%

$100k–$150k 16.5%

$150k–$200k 7.6%

$200k+ 3.6%

Range	% of households
Under $10k	4.0%
$10k–$15k	4.5%
$15k–$25k	5.4%
$25k–$35k	9.4%
$35k–$50k	14.3%
$50k–$75k	27.2%
$75k–$100k	7.6%
$100k–$150k	16.5%
$150k–$200k	7.6%
$200k+	3.6%
Median income	$65,000

Housing

Home values

Under $50k 13.0%

$50k–$100k 21.7%

$100k–$150k 10.3%

$150k–$200k 14.1%

$200k–$300k 22.3%

$300k–$500k 14.1%

$500k–$1M 4.3%

Housing overview

Metric	Value
Median home value	$161,800
Median rent / month	$675
Owner occupied	82.1%
Renter occupied	17.9%
Vacant	30.0%
Single-family detached	86.6%
Large apartment buildings	0.0%
Mobile homes	13.4%
Median rooms	6.1
Avg household size (owned)	2.54

Year built

Era	%
2020 or later	0.9%
2010–2019	3.8%
2000–2009	1.9%
1990–1999	11.3%
1980–1989	10.0%
1970–1979	12.5%
1960–1969	8.4%
1950–1959	5.3%
1940–1949	6.3%
1939 or earlier	39.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.9%
1 bedroom	7.5%
2 bedrooms	19.7%
3 bedrooms	50.0%
4 bedrooms	21.9%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	7.6%
1 vehicle	29.5%
2 vehicles	33.9%
3 or more	29.0%

Heating fuel

Fuel type	%
Electricity	21.4%
Propane / LP gas	16.1%
Fuel oil	28.1%
Wood	11.6%
No fuel used	1.3%

Households & families

Household type	Count	%
Married-couple family	151	67.4%
Cohabiting couple	3	1.3%
Male householder, no spouse	46	20.5%
Female householder, no spouse	24	10.7%
Households with children under 18	57	25.4%
Households with seniors (65+)	107	47.8%
Average household size	2.46

Marital status

Status	Male	Female
Never married	19.8%	15.6%
Married	68.4%	72.7%
Separated	0.8%	0.0%
Widowed	0.8%	8.3%
Divorced	10.1%	3.4%

Education

Less than 9th grade 4.1%

Some HS, no diploma 8.7%

HS graduate 52.1%

Some college, no degree 12.1%

Associate's degree 11.8%

Bachelor's degree 9.7%

Graduate / professional 1.5%

Metric	%
HS diploma or higher	87.2%
Bachelor's or higher	11.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	4	3.4%
Elementary school	85	72.0%
High school	15	12.7%
College / grad school	14	11.9%

Employment

Industry of employment

Construction 24.4%

Education & healthcare 18.3%

Manufacturing 15.4%

Other services 8.5%

Retail trade 6.9%

Transportation & utilities 6.1%

Agriculture & mining 4.5%

Professional & management 3.7%

Wholesale trade 3.3%

Finance & real estate 2.8%

Arts, food & hospitality 2.8%

Public administration 2.0%

Information 1.2%

Occupation

Category	%
Management, business & arts	24.0%
Service	13.0%
Sales & office	15.9%
Natural resources & construction	29.7%
Production & transportation	17.5%

Employment type

Type	%
Private sector	74.0%
Government	6.5%
Self-employed	19.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	85.5%
Carpool	5.0%
Public transit	0.0%
Walk	4.5%
Work from home	3.6%
Other means	1.4%
Avg commute (minutes)	32.0

Poverty

All people 9.3%

Under 18 years 11.9%

18 and over 8.6%

Married-couple families 5.3%

Female-led households 0.0%

Income support

Source	% of households
Social Security	45.1%
Retirement income	22.8%
Supplemental Security	3.1%
Cash public assistance	1.3%
Food stamps / SNAP	7.6%

Health indicators

Condition	%
Obesity	36.0%
High blood pressure	35.9%
High cholesterol	35.8%
Diabetes	11.7%
Heart disease	8.1%
Stroke	3.5%
Asthma	10.1%
Arthritis	31.3%
Kidney disease	3.2%
Pulmonary disease	9.1%
Cancer	7.6%

Behavior / access	%
Smoking	22.1%
Binge drinking	18.4%
No physical activity	26.9%
Less than 7 hrs sleep	36.6%
Depression	22.1%
Fair or poor health	16.3%
Poor mental health	15.6%
Poor physical health	12.1%
No health insurance	10.9%
Visited doctor (checkup)	78.0%
Visited dentist	63.1%
Cholesterol screening	89.8%
Teeth loss	16.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	48	11.1%

Disability	%
Any disability	17.1%
Under 18	13.6%
18–64 years	4.7%
65 and over	41.4%

Health insurance coverage

Type	%
Private insurance	67.8%
Public insurance	40.4%
No insurance	10.7%
Uninsured under 19	24.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	536	97.5%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	547	99.5%
Born in same state	547	99.5%
Born in different state	505	91.8%
Foreign born	0	0.0%
Naturalized citizen	3	0.5%
Not a US citizen	3	100.0%

Ancestry

Ancestry	Count	%
Italian	59	10.7%
French	43	7.8%

Ancestry	Count	%
Arab	32	5.8%
English	6	1.1%

Technology access

Metric	% of households
Computer access	40.7%
Internet access	79.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 15551

What city is ZIP code 15551 in?

ZIP code 15551 is primarily assigned to Markleton, Pennsylvania.

What county is ZIP code 15551 in?

ZIP code 15551 falls within Somerset County, Pennsylvania.

Does ZIP code 15551 have an older population?

29% of residents in ZIP code 15551 are 65 or older, above the national average of ~17%.

How educated is the population of ZIP code 15551?

11% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Does ZIP code 15551 have a large retiree population?

45% of households in ZIP code 15551 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 15551 mostly owner-occupied?

82% of occupied units in ZIP code 15551 are owner-occupied, well above the national average.

What timezone is ZIP code 15551 in?

ZIP code 15551 observes the EST timezone.