17840 ZIP Code — Locust Gap, PA

Northumberland County, Pennsylvania

ZIP code 17840 is located in Locust Gap, Pennsylvania, within Northumberland County. It covers approximately 1.98 square miles and serves a population of 363 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 570/272.

About ZIP code 17840

The housing stock consists of a mix of housing types. Most homes were built in the 1970s, giving the area an established character. Owner-occupancy is high at 82%, well above the national average.

Median household income is $87,695. The poverty rate of 5% is below the national average. SNAP benefit usage at 23% of households reflects economic stress in the area. 37% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 31 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 (24%) compared to national benchmarks.

Overall, ZIP code 17840 reflects a community defined by a trades-oriented workforce, high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

363

population

1.98

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

17840 ZIP code map

Cities in ZIP code 17840

Below are the cities the US Postal Service accepts for ZIP code 17840. Using any city not on this list may result in mail delivery delays.

City	Status
Locust Gap	Acceptable

Demographics updated 05/2026

Population
Total population	363
Population density	183 / sq mi
State FIPS	42
County FIPS	097

Geography
Land area	1.98 sq mi
Water area	0.00 sq mi
Latitude	40.7699
Longitude	-76.4424
Timezone	Eastern (ET)
Area code	570/272

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.5%	50.8%	39.8%
$50k – $100k	51.9%	30.7%	30.8%
$100k – $200k	9.6%	16.2%	22.4%
Over $200k	0.0%	2.3%	7.1%

Demographics & statistics

363

Population

183

People per sq mi

41.5

Median age

$87,695

Median household income

$38,162

Per capita income

Median home value

Median monthly rent

81.9%

Home ownership

5.0%

Poverty rate

9.5%

Unemployment

162

Housing units

10.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

10–14

25–34

35–44

45–54

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	77	21.2%
18 and over	286	78.8%
65 and over	94	25.9%
Median age	41.5 years

Race & ethnicity

White 100%

Group	Count	%
White	363	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	38.5%	50.8%	39.8%
$50k – $100k	51.9%	30.7%	30.8%
$100k – $200k	9.6%	16.2%	22.4%
Over $200k	0.0%	2.3%	7.1%

Under $10k 12.1%

$25k–$35k 5.4%

$35k–$50k 4.7%

$50k–$75k 20.8%

$75k–$100k 26.8%

$100k–$150k 9.4%

$150k–$200k 20.8%

Range	% of households
Under $10k	12.1%
$25k–$35k	5.4%
$35k–$50k	4.7%
$50k–$75k	20.8%
$75k–$100k	26.8%
$100k–$150k	9.4%
$150k–$200k	20.8%
Median income	$87,695

Housing

Home values

Under $50k 54.9%

$50k–$100k 9.8%

$100k–$150k 25.4%

$200k–$300k 3.3%

$300k–$500k 6.6%

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$0
Owner occupied	81.9%
Renter occupied	18.1%
Vacant	21.2%
Single-family detached	34.9%
Large apartment buildings	0.0%
Mobile homes	8.5%
Median rooms	7.5
Avg household size (owned)	2.69

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	14.3%
1990–1999	0.0%
1980–1989	0.0%
1970–1979	39.2%
1960–1969	0.0%
1950–1959	0.0%
1940–1949	7.4%
1939 or earlier	39.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	26.5%
3 bedrooms	27.0%
4 bedrooms	30.2%
5+ bedrooms	16.4%

Vehicles per household

Vehicles	% of households
No vehicle	5.4%
1 vehicle	30.2%
2 vehicles	37.6%
3 or more	26.8%

Heating fuel

Fuel type	%
Electricity	15.4%
Propane / LP gas	4.7%
Fuel oil	59.1%

Households & families

Household type	Count	%
Married-couple family	82	55.0%
Cohabiting couple	41	27.5%
Male householder, no spouse	18	12.1%
Female householder, no spouse	8	5.4%
Households with children under 18	39	26.2%
Households with seniors (65+)	55	36.9%
Average household size	2.44

Marital status

Status	Male	Female
Never married	32.9%	25.4%
Married	61.8%	61.9%
Separated	0.0%	0.0%
Widowed	0.0%	6.0%
Divorced	5.3%	6.7%

Education

Less than 9th grade 0.0%

Some HS, no diploma 2.4%

HS graduate 76.9%

Some college, no degree 8.4%

Associate's degree 1.4%

Bachelor's degree 10.8%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	97.6%
Bachelor's or higher	10.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	15	100.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Education & healthcare 38.4%

Construction 23.3%

Public administration 18.0%

Transportation & utilities 11.6%

Finance & real estate 4.7%

Other services 4.1%

Occupation

Category	%
Management, business & arts	56.4%
Service	8.7%
Sales & office	2.9%
Natural resources & construction	23.3%
Production & transportation	8.7%

Employment type

Type	%
Private sector	43.0%
Government	52.9%
Self-employed	4.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	31.0

Poverty

All people 5.0%

Under 18 years 0.0%

18 and over 6.3%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	36.9%
Retirement income	36.9%
Supplemental Security	5.4%
Cash public assistance	5.4%
Food stamps / SNAP	22.8%

Health indicators

Condition	%
Obesity	37.2%
High blood pressure	35.0%
High cholesterol	34.7%
Diabetes	11.0%
Heart disease	7.5%
Stroke	3.4%
Asthma	10.4%
Arthritis	31.5%
Kidney disease	3.1%
Pulmonary disease	9.2%
Cancer	7.2%

Behavior / access	%
Smoking	23.9%
Binge drinking	18.9%
No physical activity	26.4%
Less than 7 hrs sleep	38.0%
Depression	24.6%
Fair or poor health	16.8%
Poor mental health	16.7%
Poor physical health	12.3%
No health insurance	11.8%
Visited doctor (checkup)	78.0%
Visited dentist	59.2%
Cholesterol screening	89.0%
Teeth loss	17.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	7	2.4%

Disability	%
Any disability	14.6%
Under 18	0.0%
18–64 years	8.9%
65 and over	38.3%

Health insurance coverage

Type	%
Private insurance	69.1%
Public insurance	52.3%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	301	82.9%
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)	363	100.0%
Born in same state	363	100.0%
Born in different state	355	97.8%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Norwegian	32	8.8%
French	26	7.2%

Ancestry	Count	%
Italian	14	3.9%
English	8	2.2%

Technology access

Metric	% of households
Computer access	41.0%
Internet access	81.9%

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

Frequently asked questions about ZIP code 17840

What city is ZIP code 17840 in?

ZIP code 17840 is primarily assigned to Locust Gap, Pennsylvania.

What county is ZIP code 17840 in?

ZIP code 17840 falls within Northumberland County, Pennsylvania.

Does ZIP code 17840 have an older population?

26% of residents in ZIP code 17840 are 65 or older, above the national average of ~17%.

How educated is the population of ZIP code 17840?

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

Is ZIP code 17840 mostly owner-occupied?

82% of occupied units in ZIP code 17840 are owner-occupied, well above the national average.

Does ZIP code 17840 have a large retiree population?

37% of households in ZIP code 17840 receive Social Security income, suggesting a significant retiree or disability population.

What timezone is ZIP code 17840 in?

ZIP code 17840 observes the EST timezone.