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 High-density area
- $155,833
- Median income Above-median income area
- $443,300
- Median home value Above-median home value
- 35.1%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 average New Jersey ZIP), while per-capita income is $56,842. Both reported hardship measures are comparatively low in absolute terms: poverty is 0.0% and unemployment is 0.0%. Median home value is $443,300 (14% below the average New Jersey ZIP); 87.0% of occupied homes 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 -. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Somerset County, so 08821 can be compared with both its immediate and county-level context.
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
Who lives in ZIP 08821?
40.1
Median Age
40.3%
Male
59.7%
Female
2.5%
Foreign-Born
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 ZIP avg
$56,842
Per Capita Income
0.0%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 08821 ranks among New Jersey ZIPs
Flagtown, NJ household income vs. every New Jersey ZIP code
Median household income among 565 reporting New Jersey ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$155,833 Top 21% higher than 79% of 565 New Jersey ZIPs
Each bar is a $20K-wide band; taller bars hold more New Jersey 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
108housing units
108
Total Housing Units
108
Occupied Units
0
Vacant Units
2.62
Avg Household Size
Occupancy Type
$443,300
Median Home Value
-14% vs state ZIP avg
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.
- 08844
Hillsborough (08844)
38,367 residents
- 08807
Bridgewater (08807)
37,972 residents
- 08876
Somerville (08876)
22,179 residents
- 08502 11,317
Belle Mead (08502)
11,317 residents
- 08835 10,344
Manville (08835)
10,344 residents
- 08869 6,881
Raritan (08869)
6,881 residents
- 08558 6,629
Skillman (08558)
6,629 residents
- 08853 5,247
Neshanic Station (08853)
5,247 residents
- 08887 1,106
Three Bridges (08887)
1,106 residents
What this shows Among its immediate neighbors, ZIP 08821 ranks #0 by population - useful context the national average alone can't give.
ZIP 08821 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 08558
Skillman (08558)
$236,016 median income
- 08502
Belle Mead (08502)
$227,242 median income
- 08853
Neshanic Station (08853)
$220,725 median income
- 08807
Bridgewater (08807)
$168,696 median income
- 08821
Flagtown (08821)
$155,833 median income
- 08844
Hillsborough (08844)
$153,556 median income
- 08876
Somerville (08876)
$122,884 median income
- 08887
Three Bridges (08887)
$109,333 median income
- 08869
Raritan (08869)
$107,672 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 08821, both outside NJ so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Somerset County
Related Areas
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.
Related
Take this with you
What to do with ZIP 08821's numbers, next.
- See how ZIP 08821 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Flagtown, NJ ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.