08691 ZIP Code — Robbinsville, NJ

Mercer County, New Jersey

ZIP code 08691 is located in Robbinsville, New Jersey, within Mercer County. It covers approximately 24.23 square miles and serves a population of 16,935 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 609.

About ZIP code 08691

The housing stock consists of a mix of housing types. Most homes were built in the 1990s, giving the area an established character. Median home value is $479,000. Owner-occupancy is high at 80%, well above the national average.

The gap between median ($126,628) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average. 30% 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 34 minutes is near the national average.

Educational attainment is high — 62% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 08691 reflects a community defined by a highly educated population, high homeownership, and a significant Social Security-dependent population.

16,935

population

24.23

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

08691 ZIP code map

Cities in ZIP code 08691

Below are the cities the US Postal Service accepts for ZIP code 08691. Using any city not on this list may result in mail delivery delays.

City	Status
Robbinsville	Acceptable
Robbinsville	Preferred

Nearby ZIP codes

08520 Hightstown (4 mi) 08690 Trenton (4.4 mi) 08550 Princeton Junction (5.3 mi) 08501 Allentown (5.4 mi) 08620 Trenton (5.4 mi) 08619 Trenton (6.8 mi) 08515 Chesterfield (6.8 mi) 08535 Millstone Township (7.1 mi) 08610 Trenton (7.2 mi) 08514 Cream Ridge (7.3 mi) 08510 Millstone Township (7.8 mi) 08512 Cranbury (7.9 mi)

Demographics updated 05/2026

Population
Total population	16,935
Population density	699 / sq mi
State FIPS	34
County FIPS	021

Geography
Land area	24.23 sq mi
Water area	0.18 sq mi
Latitude	40.2146
Longitude	-74.5760
Timezone	Eastern (ET)
Area code	609

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	18.7%	30.6%	30.2%
$50k – $100k	21.0%	25.8%	26.7%
$100k – $200k	32.4%	28.0%	28.3%
Over $200k	28.0%	15.6%	14.8%

Demographics & statistics

16,935

Population

699

People per sq mi

44.6

Median age

$126,628

Median household income

$63,284

Per capita income

$479,000

Median home value

$1,851

Median monthly rent

79.7%

Home ownership

3.0%

Poverty rate

5.2%

Unemployment

5,787

Housing units

62.2%

Bachelor's or higher

Age distribution

Male Female

259

Under 5

302

516

5–9

601

652

10–14

759

615

15–19

717

269

20–24

313

535

25–34

623

1,136

35–44

1,323

1,392

45–54

1,623

648

55–59

756

472

60–64

551

696

65–74

812

397

75–84

462

234

85+

272

← Male

Female →

Age summary

Group	Count	%
Under 18	4,145	24.5%
18 and over	12,790	75.5%
65 and over	2,873	17.0%
Median age	44.6 years

Race & ethnicity

White 63.8%

Asian 24.5%

Two or more races 4.4%

Black or African American 3.9%

Hispanic or Latino 2.4%

Other race 1%

Group	Count	%
White	11,070	63.8%
Asian	4,256	24.5%
Two or more races	757	4.4%
Black or African American	670	3.9%
Hispanic or Latino	421	2.4%
Other race	181	1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	18.7%	30.6%	30.2%
$50k – $100k	21.0%	25.8%	26.7%
$100k – $200k	32.4%	28.0%	28.3%
Over $200k	28.0%	15.6%	14.8%

Under $10k 2.6%

$10k–$15k 1.4%

$15k–$25k 6.6%

$25k–$35k 3.8%

$35k–$50k 7.7%

$50k–$75k 8.2%

$75k–$100k 9.3%

$100k–$150k 14.3%

$150k–$200k 16.8%

$200k+ 29.2%

Range	% of households
Under $10k	2.6%
$10k–$15k	1.4%
$15k–$25k	6.6%
$25k–$35k	3.8%
$35k–$50k	7.7%
$50k–$75k	8.2%
$75k–$100k	9.3%
$100k–$150k	14.3%
$150k–$200k	16.8%
$200k+	29.2%
Median income	$126,628

Housing

Home values

Under $50k 3.2%

$50k–$100k 2.1%

$100k–$150k 3.0%

$150k–$200k 3.8%

$200k–$300k 13.1%

$300k–$500k 27.5%

$500k–$1M 44.2%

$1M+ 3.0%

Housing overview

Metric	Value
Median home value	$479,000
Median rent / month	$1,851
Owner occupied	79.7%
Renter occupied	20.3%
Vacant	4.5%
Single-family detached	46.2%
Large apartment buildings	15.2%
Mobile homes	1.8%
Median rooms	6.1
Avg household size (owned)	2.60

Year built

Era	%
2020 or later	1.4%
2010–2019	7.1%
2000–2009	25.1%
1990–1999	25.7%
1980–1989	24.2%
1970–1979	5.4%
1960–1969	3.8%
1950–1959	4.0%
1940–1949	2.2%
1939 or earlier	1.1%

Bedrooms

Size	% of units
No bedroom (studio)	2.2%
1 bedroom	6.9%
2 bedrooms	34.1%
3 bedrooms	26.0%
4 bedrooms	26.1%
5+ bedrooms	4.7%

Vehicles per household

Vehicles	% of households
No vehicle	7.2%
1 vehicle	32.1%
2 vehicles	40.6%
3 or more	20.0%

Heating fuel

Fuel type	%
Utility gas	84.7%
Electricity	11.9%
Propane / LP gas	0.7%
Fuel oil	2.3%
Wood	0.4%

Households & families

Household type	Count	%
Married-couple family	4,123	60.1%
Cohabiting couple	82	1.2%
Male householder, no spouse	778	11.3%
Female householder, no spouse	1,874	27.3%
Households with children under 18	2,577	37.6%
Households with seniors (65+)	2,196	32.0%
Average household size	2.47

Marital status

Status	Male	Female
Never married	27.9%	20.3%
Married	65.4%	57.3%
Separated	0.2%	2.7%
Widowed	0.8%	10.5%
Divorced	5.6%	9.2%

Education

Less than 9th grade 0.8%

Some HS, no diploma 2.7%

HS graduate 17.6%

Some college, no degree 10.8%

Associate's degree 5.9%

Bachelor's degree 33.6%

Graduate / professional 28.6%

Metric	%
HS diploma or higher	96.5%
Bachelor's or higher	62.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	402	8.5%
Kindergarten	175	3.7%
Elementary school	1,765	37.4%
High school	1,531	32.4%
College / grad school	847	17.9%

Employment

Industry of employment

Education & healthcare 22.3%

Professional & management 18.2%

Finance & real estate 13.4%

Public administration 9.1%

Manufacturing 9.0%

Arts, food & hospitality 6.4%

Retail trade 5.5%

Wholesale trade 3.8%

Information 3.6%

Transportation & utilities 3.5%

Construction 3.0%

Other services 1.9%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	65.1%
Service	9.9%
Sales & office	17.2%
Natural resources & construction	2.8%
Production & transportation	5.0%

Employment type

Type	%
Private sector	78.1%
Government	18.5%
Self-employed	3.3%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	69.5%
Carpool	6.6%
Public transit	3.3%
Walk	0.9%
Work from home	19.0%
Other means	0.7%
Avg commute (minutes)	33.9

Poverty

All people 3.0%

Under 18 years 1.6%

18 and over 3.5%

Married-couple families 0.8%

Female-led households 14.7%

Income support

Source	% of households
Social Security	30.1%
Retirement income	23.9%
Supplemental Security	1.6%
Cash public assistance	0.8%
Food stamps / SNAP	3.3%

Health indicators

Condition	%
Obesity	24.5%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	7.1%
Heart disease	4.6%
Stroke	2.0%
Asthma	8.6%
Arthritis	19.8%
Kidney disease	2.2%
Pulmonary disease	4.1%
Cancer	6.5%

Behavior / access	%
Smoking	10.2%
Binge drinking	16.5%
No physical activity	14.6%
Less than 7 hrs sleep	30.6%
Depression	17.0%
Fair or poor health	7.7%
Poor mental health	11.8%
Poor physical health	6.5%
No health insurance	8.6%
Visited doctor (checkup)	75.1%
Visited dentist	74.7%
Cholesterol screening	0.0%
Teeth loss	7.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	357	2.8%

Disability	%
Any disability	9.9%
Under 18	6.5%
18–64 years	5.2%
65 and over	31.3%

Health insurance coverage

Type	%
Private insurance	90.5%
Public insurance	21.1%
No insurance	1.4%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	16,374	96.7%
Spanish	1,037	6.3%
Other Indo-European	130	0.8%
Asian & Pacific Islander	484	3.0%
Other languages	410	2.5%

Place of birth & citizenship

Origin	Count	%
Native born (US)	12,920	76.3%
Born in same state	12,772	75.4%
Born in different state	8,237	48.6%
Foreign born	148	0.9%
Naturalized citizen	4,015	23.7%
Not a US citizen	2,589	64.5%

Ancestry

Ancestry	Count	%
Italian	2,401	14.2%
French	1,114	6.6%
Arab	594	3.5%
English	481	2.8%
Irish	406	2.4%

Ancestry	Count	%
Polish	129	0.8%
Norwegian	92	0.5%
German	38	0.2%
Dutch	22	0.1%

Technology access

Metric	% of households
Computer access	40.5%
Internet access	95.8%

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

Frequently asked questions about ZIP code 08691

What city is ZIP code 08691 in?

ZIP code 08691 is primarily assigned to Robbinsville, New Jersey.

What county is ZIP code 08691 in?

ZIP code 08691 falls within Mercer County, New Jersey.

How educated is the population of ZIP code 08691?

62% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 08691?

The median household income in ZIP code 08691 is $126,628, above the national median of ~$75,000.

What is the typical home value in ZIP code 08691?

The median home value in ZIP code 08691 is $479,000.

What is the population of ZIP code 08691?

ZIP code 08691 has an estimated population of 16,935 residents, with a density of 699 people per square mile.

What timezone is ZIP code 08691 in?

ZIP code 08691 observes the EST timezone.