PlainZIP

Flagtown, NJ · standard

ZIP Code 08821

Somerset County, New Jersey - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

354
457/sq mi
$155,833
Median income
$443,300
Median home value
35.1%
Bachelor's or higher

The verdict

Flagtown pairs a top-decile household income with upper-quartile home values, in a low-density, homeowner-dominated area.

Top 3%
household income, US ZIPs
Top 17%
home value, US ZIPs
457
people per sq mi
87%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 08821 against every reporting US ZIP.

ZIP code 08821 is a sparsely populated ZIP (a standard USPS delivery area) in Flagtown, Somerset County, New Jersey, home to just 354 residents across 0.8 square miles, a density of 457 people per square mile, in the New York time zone.

ZIP 08821 skews affluent, with a median household income of $155,833 (28% above the New Jersey average), while per-capita income is $56,842. Poverty here runs at 0.0%, with unemployment measured at 0.0%. On housing, the median home value is $443,300 (14% below the state average) with median rent at - per month, and 87.0% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 35.1% of adults hold a bachelor's degree or higher, the median age is 40.1, and the average commute is -. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 08821, plus 6 more within Somerset County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 08821, Flagtown, NJ · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

354

Population

0.8

Area (sq mi)

457

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 08821?

40.1

Median Age

40.3%

Male

59.7%

Female

2.5%

Foreign-Born

White 92.6%
African American 7.4%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 0.0%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$155,833

Median Household Income

+28% vs state

$56,842

Per Capita Income

0.0%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 08821 ranks nationally

Flagtown, NJ household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$155,833 Top 3% higher than 97% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). This entry sits in this band. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 49.8%
Bachelor's Degree or Higher 35.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

108

Total Housing Units

108

Occupied Units

0

Vacant Units

2.62

Avg Household Size

Occupancy Type

Owner 87.0%
Renter 13.0%

$443,300

Median Home Value

-14% vs state

1938

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 9 business establishments in ZIP 08821, employing approximately 53 people with a combined annual payroll of $3,288,000.

9

Businesses

53

Employees

$3.3M

Annual Payroll

0

Industry Sectors

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 08821 vs 08844 →

ZIP 08821 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 08821 ranks #0 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 08821 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 08821 ranks #5 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
08844 Hillsborough, NJ 38,367 1.6 mi
08853 Neshanic Station, NJ 5,247 2.9 mi
08876 Somerville, NJ 22,179 4.7 mi
08869 Raritan, NJ 6,881 4.3 mi
08502 Belle Mead, NJ 11,317 5.2 mi
08887 Three Bridges, NJ 1,106 5.7 mi
08835 Manville, NJ 10,344 5.3 mi
08558 Skillman, NJ 6,629 7.4 mi
08890 Zarephath, NJ 17 6.0 mi
08807 Bridgewater, NJ 37,972 6.1 mi

More ZIP Codes in Somerset County

08873 standard
Somerset, NJ
Pop: 49,921
08844 standard
Hillsborough, NJ
Pop: 38,367
08807 standard
Bridgewater, NJ
Pop: 37,972
07920 standard
Basking Ridge, NJ
Pop: 26,747
08876 standard
Somerville, NJ
Pop: 22,179
07059 standard
Warren, NJ
Pop: 15,311

Related Areas

Somerset County Flagtown, NJ New Jersey

Frequently Asked Questions

What county is ZIP code 08821 in? ▼
ZIP code 08821 (Flagtown) is located in Somerset County, New Jersey. Somerset County contains multiple ZIP codes, see the full list at /counties/somerset-nj.
What is the population of ZIP code 08821? ▼
ZIP code 08821 in Flagtown, NJ has a population of 354 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 08821? ▼
The median household income in ZIP 08821 is $155,833, which is 104% above the national average of $76,288.
What is the average home value in ZIP 08821? ▼
The median home value in ZIP 08821 is $443,300, which is 59% above the national average of $278,155.
What is the demographic makeup of ZIP 08821? ▼
The largest racial group in ZIP 08821 is White at 92.6%.
How many businesses are in ZIP code 08821? ▼
ZIP code 08821 has 9 business establishments employing approximately 53 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 08821? ▼
In ZIP code 08821, 49.8% of residents aged 25+ have a high school diploma or higher, and 35.1% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 08821? ▼
In ZIP code 08821, approximately 87.0% of occupied housing units are owner-occupied and 13.0% are renter-occupied, based on Census ACS 2023 data.

Read our methodology to see how this data is sourced, computed, and verified.