08821 ZIP Code — Flagtown, NJ

Somerset County, New Jersey

ZIP code 08821 is located in Flagtown, New Jersey, within Somerset County. It covers approximately 0.24 square miles and serves a population of 514 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 848.

About ZIP code 08821

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 $472,600.

Median household income is $118,333. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is sales and office, with retail trade as the leading industry. The average commute of 26 minutes is near the national average.

Educational attainment is near the national average, with 37% of residents holding a bachelor's degree or higher.

Overall, ZIP code 08821 reflects a community defined by high homeownership and a significant Social Security-dependent population.

514

population

0.24

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

08821 ZIP code map

Cities in ZIP code 08821

Below are the cities the US Postal Service accepts for ZIP code 08821. Using any city not on this list may result in mail delivery delays.

City	Status
Flagtown	Acceptable

Demographics updated 05/2026

Population
Total population	514
Population density	2,142 / sq mi
State FIPS	34
County FIPS	035

Geography
Land area	0.24 sq mi
Water area	0.00 sq mi
Latitude	40.5206
Longitude	-74.6820
Timezone	Eastern (ET)
Area code	848

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.8%	19.6%	30.2%
$50k – $100k	40.1%	22.9%	26.7%
$100k – $200k	23.9%	31.5%	28.3%
Over $200k	9.2%	26.0%	14.8%

Demographics & statistics

514

Population

2,142

People per sq mi

39.4

Median age

$118,333

Median household income

$44,220

Per capita income

$472,600

Median home value

Median monthly rent

100.0%

Home ownership

0.0%

Poverty rate

0.0%

Unemployment

194

Housing units

36.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	153	29.8%
18 and over	361	70.2%
65 and over	107	20.8%
Median age	39.4 years

Race & ethnicity

White 87.4%

Asian 8.8%

Black or African American 3.9%

Group	Count	%
White	449	87.4%
Asian	45	8.8%
Black or African American	20	3.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	26.8%	19.6%	30.2%
$50k – $100k	40.1%	22.9%	26.7%
$100k – $200k	23.9%	31.5%	28.3%
Over $200k	9.2%	26.0%	14.8%

$50k–$75k 14.5%

$75k–$100k 9.0%

$100k–$150k 45.8%

$150k–$200k 14.5%

$200k+ 16.3%

Range	% of households
$50k–$75k	14.5%
$75k–$100k	9.0%
$100k–$150k	45.8%
$150k–$200k	14.5%
$200k+	16.3%
Median income	$118,333

Housing

Home values

$200k–$300k 12.0%

$300k–$500k 48.2%

$500k–$1M 39.8%

Housing overview

Metric	Value
Median home value	$472,600
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	14.4%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.9
Avg household size (owned)	3.10

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	7.7%
1980–1989	8.2%
1970–1979	6.2%
1960–1969	8.2%
1950–1959	21.6%
1940–1949	0.0%
1939 or earlier	47.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	28.9%
3 bedrooms	38.7%
4 bedrooms	26.3%
5+ bedrooms	6.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	19.3%
2 vehicles	44.0%
3 or more	36.7%

Heating fuel

Fuel type	%
Utility gas	71.1%
Fuel oil	28.9%

Households & families

Household type	Count	%
Married-couple family	113	68.1%
Cohabiting couple	12	7.2%
Male householder, no spouse	31	18.7%
Female householder, no spouse	10	6.0%
Households with children under 18	89	53.6%
Households with seniors (65+)	59	35.5%
Average household size	3.10

Marital status

Status	Male	Female
Never married	26.8%	15.9%
Married	73.2%	63.4%
Separated	0.0%	0.0%
Widowed	0.0%	9.1%
Divorced	0.0%	11.6%

Education

Less than 9th grade 4.2%

Some HS, no diploma 0.0%

HS graduate 32.3%

Some college, no degree 2.7%

Associate's degree 24.0%

Bachelor's degree 23.4%

Graduate / professional 13.5%

Metric	%
HS diploma or higher	95.8%
Bachelor's or higher	36.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	108	71.5%
High school	16	10.6%
College / grad school	27	17.9%

Employment

Industry of employment

Retail trade 20.3%

Education & healthcare 18.5%

Finance & real estate 12.1%

Other services 11.7%

Public administration 10.3%

Information 9.3%

Professional & management 6.8%

Transportation & utilities 5.7%

Arts, food & hospitality 5.3%

Occupation

Category	%
Management, business & arts	30.6%
Service	17.8%
Sales & office	37.0%
Natural resources & construction	0.0%
Production & transportation	14.6%

Employment type

Type	%
Private sector	65.8%
Government	28.8%
Self-employed	5.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	95.4%
Carpool	4.6%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	26.2

Poverty

All people 0.0%

Under 18 years 0.0%

18 and over 0.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	35.5%
Retirement income	25.9%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	24.7%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	6.5%
Heart disease	4.4%
Stroke	1.8%
Asthma	8.2%
Arthritis	17.6%
Kidney disease	2.0%
Pulmonary disease	3.7%
Cancer	6.3%

Behavior / access	%
Smoking	9.6%
Binge drinking	18.9%
No physical activity	13.4%
Less than 7 hrs sleep	29.7%
Depression	18.0%
Fair or poor health	7.5%
Poor mental health	12.0%
Poor physical health	6.2%
No health insurance	8.9%
Visited doctor (checkup)	73.1%
Visited dentist	74.8%
Cholesterol screening	0.0%
Teeth loss	6.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	6.2%
Under 18	0.0%
18–64 years	0.0%
65 and over	29.9%

Health insurance coverage

Type	%
Private insurance	100.0%
Public insurance	20.8%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	485	94.4%
Spanish	18	3.7%
Other Indo-European	0	0.0%
Asian & Pacific Islander	18	3.7%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	490	95.3%
Born in same state	490	95.3%
Born in different state	342	66.5%
Foreign born	0	0.0%
Naturalized citizen	24	4.7%
Not a US citizen	24	100.0%

Ancestry

Ancestry	Count	%
French	52	10.1%
Arab	28	5.4%

Ancestry	Count	%
Italian	27	5.3%
Dutch	4	0.8%

Technology access

Metric	% of households
Computer access	32.3%
Internet access	100.0%

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

Frequently asked questions about ZIP code 08821

What city is ZIP code 08821 in?

ZIP code 08821 is primarily assigned to Flagtown, New Jersey.

What county is ZIP code 08821 in?

ZIP code 08821 falls within Somerset County, New Jersey.

Does ZIP code 08821 have a large retiree population?

36% of households in ZIP code 08821 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 08821?

The median home value in ZIP code 08821 is $472,600.

What is the median household income in ZIP code 08821?

The median household income in ZIP code 08821 is $118,333, above the national median of ~$75,000.

What is the population of ZIP code 08821?

ZIP code 08821 has an estimated population of 514 residents, with a density of 2,160 people per square mile.

What timezone is ZIP code 08821 in?

ZIP code 08821 observes the EST timezone.