PlainZIP

Monroe Township, NJ · standard

ZIP Code 08831

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

45,620
350/sq mi
$109,042
Median income
$516,800
Median home value
51.8%
Bachelor's or higher

The verdict

Monroe Township pairs an upper-quartile household income with upper-quartile home values, in a low-density, homeowner-dominated area.

Top 14%
household income, US ZIPs
Top 12%
home value, US ZIPs
350
people per sq mi
90%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 08831 against every reporting US ZIP.

ZIP code 08831 is a densely settled ZIP (a standard USPS delivery area) in Monroe Township, Middlesex County, New Jersey, with 45,620 residents across 130.3 square miles, a density of 350 people per square mile, in the New York time zone.

ZIP 08831 lands in the middle-income range, with a median household income of $109,042 (11% below the New Jersey average), while per-capita income is $67,012. Local economic indicators show a 3.6% poverty rate alongside 5.1% unemployment. The typical home here is valued at $516,800 (0% above the state average); renters pay a median of $2,014 monthly, and 89.6% of units are owner-occupied.

This is a highly-educated ZIP: 51.8% of adults hold a bachelor's degree or higher, the median age is 54.8, and the average commute is 38 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 08831, plus 6 more within Middlesex 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 →

Top industries in ZIP 08831

Top 5 sectors by establishment count in Monroe Township, NJ

Which industries have the most business establishments in ZIP 08831.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

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 08831, Monroe Township, 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

45,620

Population

130.3

Area (sq mi)

350

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 08831?

54.8

Median Age

48.4%

Male

51.6%

Female

27.2%

Foreign-Born

White 63.8%
African American 2.4%
Asian 25.3%
American Indian or Alaska Native 0.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.6%
Hispanic or Latino 10.4%

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?

$109,042

Median Household Income

-11% vs state

$67,012

Per Capita Income

3.6%

Poverty Rate

5.1%

Unemployment Rate

37.9 min

Mean Commute Time

How ZIP 08831 ranks nationally

Monroe Township, NJ household income vs. every US ZIP code

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

$109,042 Top 14% higher than 86% 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%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $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 73.6%
Bachelor's Degree or Higher 51.8%

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

What does housing look like?

24,806

Total Housing Units

24,083

Occupied Units

723

Vacant Units

2.29

Avg Household Size

Occupancy Type

Owner 89.6%
Renter 10.4%

$516,800

Median Home Value

+0% vs state

$2,014

Median Rent

1994

Median Year Built

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

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+15.0%

YoY Change (2024)

278

HPI Index (2000 = 100)

+178%

Total Change Since 2000

Home values in ZIP 08831 have increased 15.0% over the past year (2024). Since 2000, this ZIP has seen +178% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.2% 184
2021 +8.0% 199
2022 +16.0% 231
2023 +5.0% 242
2024 +15.0% 278

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 1,134 business establishments in ZIP 08831, employing approximately 17,939 people with a combined annual payroll of $1,324,043,000.

1,134

Businesses

17,939

Employees

$1.3B

Annual Payroll

15

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 245 21.6%
Health care and social assistance 152 13.4%
Construction 109 9.6%
Wholesale trade 87 7.7%
Other services (except public administration) 87 7.7%
Retail trade 84 7.4%
Accommodation and food services 81 7.1%
Transportation and warehousing 79 7.0%
Administrative and support and waste management and remediation services 72 6.3%
Finance and insurance 44 3.9%
Real estate and rental and leasing 25 2.2%
Educational services 18 1.6%
Arts, entertainment, and recreation 18 1.6%
Information 15 1.3%
Manufacturing 14 1.2%

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 08831 vs 08828 →

ZIP 08831 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 08831 ranks #2 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 08831 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 08831 ranks #9 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
08828 Helmetta, NJ 2,178 3.5 mi
08535 Millstone Township, NJ 5,385 6.3 mi
08512 Cranbury, NJ 10,105 5.1 mi
08884 Spotswood, NJ 8,257 5.1 mi
08810 Dayton, NJ 8,401 4.6 mi
08816 East Brunswick, NJ 46,298 7.1 mi
08850 Milltown, NJ 8,281 8.4 mi
07726 Englishtown, NJ 42,508 5.5 mi
08510 Millstone Township, NJ 5,231 9.4 mi
08555 Roosevelt, NJ 877 7.7 mi

More ZIP Codes in Middlesex County

08854 standard
Piscataway, NJ
Pop: 55,961
08901 standard
New Brunswick, NJ
Pop: 55,223
08861 standard
Perth Amboy, NJ
Pop: 53,099
08816 standard
East Brunswick, NJ
Pop: 46,298
08817 standard
Edison, NJ
Pop: 44,621
08902 standard
North Brunswick, NJ
Pop: 41,153

Related Areas

Middlesex County Monroe Township, NJ New Jersey

Frequently Asked Questions

What county is ZIP code 08831 in? ▼
ZIP code 08831 (Monroe Township) is located in Middlesex County, New Jersey. Middlesex County contains multiple ZIP codes, see the full list at /counties/middlesex-nj.
What is the population of ZIP code 08831? ▼
ZIP code 08831 in Monroe Township, NJ has a population of 45,620 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 08831? ▼
The median household income in ZIP 08831 is $109,042, which is 43% above the national average of $76,288.
What is the average home value in ZIP 08831? ▼
The median home value in ZIP 08831 is $516,800, which is 86% above the national average of $278,155.
What is the demographic makeup of ZIP 08831? ▼
The largest racial group in ZIP 08831 is White at 63.8%. Hispanic or Latino residents make up 10.4% of the population.
How many businesses are in ZIP code 08831? ▼
ZIP code 08831 has 1,134 business establishments employing approximately 17,939 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 08831? ▼
The top industries by establishment count in ZIP 08831 are: Professional, scientific, and technical services (245), Health care and social assistance (152), Construction (109). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 08831? ▼
According to the FHFA House Price Index, home values in ZIP 08831 increased by 15.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 178%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 08831? ▼
In ZIP code 08831, 73.6% of residents aged 25+ have a high school diploma or higher, and 51.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 08831? ▼
The mean commute time for workers in ZIP code 08831 is 37.9 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 08831? ▼
In ZIP code 08831, approximately 89.6% of occupied housing units are owner-occupied and 10.4% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 08831? ▼
The poverty rate in ZIP code 08831 is 3.6% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

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