17866 ZIP Code — Coal Township, PA

Northumberland County, Pennsylvania

ZIP code 17866 is located in Coal Township, Pennsylvania, within Northumberland County. It covers approximately 24.38 square miles and serves a population of 9,905 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 570/272.

About ZIP code 17866

The housing stock consists of a mix of housing types. Most homes were built in the pre-1940, giving the area an established character. Median home value is $76,800. Owner-occupancy is high at 80%, well above the national average.

Median household income is $47,943. 49% 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 25 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 (25%) compared to national benchmarks.

Overall, ZIP code 17866 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

9,905

population

24.38

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

17866 ZIP code map

Cities in ZIP code 17866

Below are the cities the US Postal Service accepts for ZIP code 17866. Using any city not on this list may result in mail delivery delays.

City	Status
Coal Township	Acceptable

Demographics updated 05/2026

Population
Total population	9,905
Population density	406 / sq mi
State FIPS	42
County FIPS	097

Geography
Land area	24.38 sq mi
Water area	0.09 sq mi
Latitude	40.7920
Longitude	-76.5577
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	64.1%	50.8%	39.8%
$50k – $100k	22.8%	30.7%	30.8%
$100k – $200k	12.0%	16.2%	22.4%
Over $200k	1.1%	2.3%	7.1%

Demographics & statistics

9,905

Population

406

People per sq mi

43.3

Median age

$47,943

Median household income

$23,086

Per capita income

$76,800

Median home value

$715

Median monthly rent

80.3%

Home ownership

13.0%

Poverty rate

8.2%

Unemployment

3,317

Housing units

11.2%

Bachelor's or higher

Age distribution

Male Female

253

Under 5

155

172

5–9

105

154

10–14

210

15–19

128

364

20–24

223

1,114

25–34

683

954

35–44

585

718

45–54

440

559

55–59

343

479

60–64

293

604

65–74

370

444

75–84

272

117

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,178	11.9%
18 and over	8,727	88.1%
65 and over	1,879	19.0%
Median age	43.3 years

Race & ethnicity

White 78.9%

Black or African American 14.6%

Hispanic or Latino 2.8%

Other race 1.9%

Two or more races 1.7%

Asian 0.2%

Group	Count	%
White	8,037	78.9%
Black or African American	1,491	14.6%
Hispanic or Latino	282	2.8%
Other race	189	1.9%
Two or more races	172	1.7%
Asian	16	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	64.1%	50.8%	39.8%
$50k – $100k	22.8%	30.7%	30.8%
$100k – $200k	12.0%	16.2%	22.4%
Over $200k	1.1%	2.3%	7.1%

Under $10k 4.8%

$10k–$15k 8.4%

$15k–$25k 12.0%

$25k–$35k 14.3%

$35k–$50k 14.5%

$50k–$75k 20.2%

$75k–$100k 10.0%

$100k–$150k 9.9%

$150k–$200k 4.5%

$200k+ 1.3%

Range	% of households
Under $10k	4.8%
$10k–$15k	8.4%
$15k–$25k	12.0%
$25k–$35k	14.3%
$35k–$50k	14.5%
$50k–$75k	20.2%
$75k–$100k	10.0%
$100k–$150k	9.9%
$150k–$200k	4.5%
$200k+	1.3%
Median income	$47,943

Housing

Home values

Under $50k 27.2%

$50k–$100k 34.3%

$100k–$150k 18.1%

$150k–$200k 9.0%

$200k–$300k 6.8%

$300k–$500k 3.7%

$500k–$1M 0.4%

$1M+ 0.6%

Housing overview

Metric	Value
Median home value	$76,800
Median rent / month	$715
Owner occupied	80.3%
Renter occupied	19.7%
Vacant	11.4%
Single-family detached	61.2%
Large apartment buildings	4.1%
Mobile homes	3.1%
Median rooms	6.4
Avg household size (owned)	2.10

Year built

Era	%
2020 or later	0.2%
2010–2019	0.3%
2000–2009	1.4%
1990–1999	2.3%
1980–1989	5.5%
1970–1979	7.7%
1960–1969	11.8%
1950–1959	8.9%
1940–1949	8.7%
1939 or earlier	53.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	5.2%
2 bedrooms	21.6%
3 bedrooms	57.4%
4 bedrooms	12.5%
5+ bedrooms	3.1%

Vehicles per household

Vehicles	% of households
No vehicle	10.7%
1 vehicle	41.8%
2 vehicles	30.8%
3 or more	16.8%

Heating fuel

Fuel type	%
Utility gas	17.5%
Electricity	23.9%
Propane / LP gas	3.7%
Fuel oil	47.3%

Households & families

Household type	Count	%
Married-couple family	1,483	41.6%
Cohabiting couple	159	4.5%
Male householder, no spouse	859	24.1%
Female householder, no spouse	1,060	29.8%
Households with children under 18	708	19.9%
Households with seniors (65+)	1,468	41.2%
Average household size	2.05

Marital status

Status	Male	Female
Never married	50.7%	23.9%
Married	35.2%	47.0%
Separated	2.9%	2.8%
Widowed	2.9%	14.0%
Divorced	8.3%	12.4%

Education

Less than 9th grade 3.1%

Some HS, no diploma 10.2%

HS graduate 55.5%

Some college, no degree 15.0%

Associate's degree 5.0%

Bachelor's degree 8.2%

Graduate / professional 3.0%

Metric	%
HS diploma or higher	86.7%
Bachelor's or higher	11.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	77	7.0%
Kindergarten	38	3.4%
Elementary school	400	36.3%
High school	325	29.5%
College / grad school	262	23.8%

Employment

Industry of employment

Education & healthcare 28.0%

Retail trade 12.8%

Manufacturing 12.6%

Public administration 7.5%

Construction 7.1%

Transportation & utilities 5.8%

Finance & real estate 5.7%

Other services 5.4%

Professional & management 4.8%

Arts, food & hospitality 4.5%

Wholesale trade 3.9%

Information 1.4%

Agriculture & mining 0.7%

Occupation

Category	%
Management, business & arts	27.2%
Service	15.1%
Sales & office	21.4%
Natural resources & construction	9.7%
Production & transportation	26.6%

Employment type

Type	%
Private sector	81.2%
Government	16.3%
Self-employed	2.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	79.1%
Carpool	13.2%
Public transit	0.7%
Walk	1.8%
Work from home	3.8%
Other means	1.3%
Avg commute (minutes)	25.4

Poverty

All people 13.0%

Under 18 years 12.1%

18 and over 13.1%

Married-couple families 4.2%

Female-led households 13.5%

Income support

Source	% of households
Social Security	48.7%
Retirement income	28.1%
Supplemental Security	8.3%
Cash public assistance	3.3%
Food stamps / SNAP	16.5%

Health indicators

Condition	%
Obesity	37.9%
High blood pressure	36.6%
High cholesterol	34.9%
Diabetes	11.9%
Heart disease	8.3%
Stroke	4.0%
Asthma	10.2%
Arthritis	30.9%
Kidney disease	3.4%
Pulmonary disease	9.9%
Cancer	7.0%

Behavior / access	%
Smoking	24.8%
Binge drinking	19.0%
No physical activity	28.6%
Less than 7 hrs sleep	39.3%
Depression	22.9%
Fair or poor health	19.2%
Poor mental health	16.5%
Poor physical health	13.0%
No health insurance	15.0%
Visited doctor (checkup)	77.7%
Visited dentist	54.2%
Cholesterol screening	86.8%
Teeth loss	22.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	716	8.2%

Disability	%
Any disability	19.8%
Under 18	5.8%
18–64 years	15.0%
65 and over	40.5%

Health insurance coverage

Type	%
Private insurance	66.8%
Public insurance	48.5%
No insurance	4.3%
Uninsured under 19	11.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	9,497	95.9%
Spanish	97	1.0%
Other Indo-European	88	0.9%
Asian & Pacific Islander	0	0.0%
Other languages	3	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	9,840	99.3%
Born in same state	9,596	96.9%
Born in different state	8,580	86.6%
Foreign born	244	2.5%
Naturalized citizen	65	0.7%
Not a US citizen	64	98.5%

Ancestry

Ancestry	Count	%
Italian	890	9%
French	685	6.9%
English	476	4.8%
Arab	216	2.2%

Ancestry	Count	%
Polish	48	0.5%
Norwegian	40	0.4%
Irish	18	0.2%

Technology access

Metric	% of households
Computer access	36.0%
Internet access	83.2%

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

Frequently asked questions about ZIP code 17866

What city is ZIP code 17866 in?

ZIP code 17866 is primarily assigned to Coal Township, Pennsylvania.

What county is ZIP code 17866 in?

ZIP code 17866 falls within Northumberland County, Pennsylvania.

Does ZIP code 17866 have a large retiree population?

49% of households in ZIP code 17866 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 17866?

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 17866 mostly owner-occupied?

80% of occupied units in ZIP code 17866 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 17866?

The median home value in ZIP code 17866 is $76,800.

What timezone is ZIP code 17866 in?

ZIP code 17866 observes the EST timezone.