08553 ZIP Code — Rocky Hill, NJ

Somerset County, New Jersey

ZIP code 08553 is located in Rocky Hill, New Jersey, within Somerset County. It covers approximately 0.61 square miles and serves a population of 794 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 609.

About ZIP code 08553

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 $587,000. Owner-occupancy is high at 86%, well above the national average.

The gap between median ($126,250) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average. 31% 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 24 minutes is near the national average. Remote work is prevalent — 24% of workers work from home.

Educational attainment is high — 77% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 08553 reflects a community defined by a highly educated population, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

794

population

0.61

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

08553 ZIP code map

Cities in ZIP code 08553

Below are the cities the US Postal Service accepts for ZIP code 08553. Using any city not on this list may result in mail delivery delays.

City	Status
Rocky Hill	Preferred

Nearby ZIP codes

08528 Kingston (1.3 mi) 08540 Princeton (1.9 mi) 08558 Skillman (3 mi) 08502 Belle Mead (3 mi) 08542 Princeton (3.3 mi) 08541 Princeton (3.7 mi) 08544 Princeton (4 mi) 08823 Franklin Park (4.6 mi) 08852 Monmouth Junction (4.8 mi) 08824 Kendall Park (4.8 mi) 08536 Plainsboro (5.1 mi) 08844 Hillsborough (7.2 mi)

Demographics updated 05/2026

Population
Total population	794
Population density	1,302 / sq mi
State FIPS	34
County FIPS	035

Geography
Land area	0.61 sq mi
Water area	0.00 sq mi
Latitude	40.4005
Longitude	-74.6395
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	17.9%	19.6%	30.2%
$50k – $100k	23.9%	22.9%	26.7%
$100k – $200k	32.1%	31.5%	28.3%
Over $200k	26.1%	26.0%	14.8%

Demographics & statistics

794

Population

1,302

People per sq mi

43.4

Median age

$126,250

Median household income

$82,593

Per capita income

$587,000

Median home value

$1,521

Median monthly rent

86.1%

Home ownership

3.7%

Poverty rate

4.8%

Unemployment

265

Housing units

76.7%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	163	20.5%
18 and over	631	79.5%
65 and over	160	20.2%
Median age	43.4 years

Race & ethnicity

White 84.9%

Two or more races 5.2%

Hispanic or Latino 4.6%

Asian 2.6%

Other race 1.7%

Black or African American 1.1%

Group	Count	%
White	706	84.9%
Two or more races	43	5.2%
Hispanic or Latino	38	4.6%
Asian	22	2.6%
Other race	14	1.7%
Black or African American	9	1.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.9%	19.6%	30.2%
$50k – $100k	23.9%	22.9%	26.7%
$100k – $200k	32.1%	31.5%	28.3%
Over $200k	26.1%	26.0%	14.8%

$15k–$25k 2.7%

$25k–$35k 5.1%

$35k–$50k 3.4%

$50k–$75k 11.5%

$75k–$100k 16.3%

$100k–$150k 16.3%

$150k–$200k 13.2%

$200k+ 31.5%

Range	% of households
$15k–$25k	2.7%
$25k–$35k	5.1%
$35k–$50k	3.4%
$50k–$75k	11.5%
$75k–$100k	16.3%
$100k–$150k	16.3%
$150k–$200k	13.2%
$200k+	31.5%
Median income	$126,250

Housing

Home values

$150k–$200k 1.2%

$200k–$300k 4.7%

$300k–$500k 25.2%

$500k–$1M 65.7%

$1M+ 3.1%

Housing overview

Metric	Value
Median home value	$587,000
Median rent / month	$1,521
Owner occupied	86.1%
Renter occupied	13.9%
Vacant	3.6%
Single-family detached	75.5%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	7.5
Avg household size (owned)	2.83

Year built

Era	%
2020 or later	0.0%
2010–2019	1.3%
2000–2009	0.0%
1990–1999	1.0%
1980–1989	5.6%
1970–1979	5.6%
1960–1969	33.3%
1950–1959	7.2%
1940–1949	3.6%
1939 or earlier	42.5%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	6.5%
2 bedrooms	18.0%
3 bedrooms	30.1%
4 bedrooms	37.9%
5+ bedrooms	6.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	33.9%
2 vehicles	47.1%
3 or more	19.0%

Heating fuel

Fuel type	%
Utility gas	81.0%
Electricity	11.5%
Fuel oil	7.5%

Households & families

Household type	Count	%
Married-couple family	152	51.5%
Cohabiting couple	14	4.7%
Male householder, no spouse	55	18.6%
Female householder, no spouse	74	25.1%
Households with children under 18	81	27.5%
Households with seniors (65+)	113	38.3%
Average household size	2.64

Marital status

Status	Male	Female
Never married	39.1%	29.5%
Married	47.3%	53.3%
Separated	1.2%	0.0%
Widowed	5.3%	3.8%
Divorced	7.1%	13.3%

Education

Less than 9th grade 0.4%

Some HS, no diploma 0.9%

HS graduate 11.7%

Some college, no degree 5.6%

Associate's degree 4.8%

Bachelor's degree 37.4%

Graduate / professional 39.3%

Metric	%
HS diploma or higher	98.7%
Bachelor's or higher	76.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	32	16.0%
Kindergarten	5	2.5%
Elementary school	70	35.0%
High school	40	20.0%
College / grad school	53	26.5%

Employment

Industry of employment

Education & healthcare 33.0%

Professional & management 19.5%

Arts, food & hospitality 10.5%

Finance & real estate 8.5%

Manufacturing 7.8%

Transportation & utilities 5.8%

Other services 4.8%

Wholesale trade 4.0%

Construction 2.0%

Information 1.5%

Public administration 1.5%

Retail trade 1.3%

Occupation

Category	%
Management, business & arts	67.5%
Service	11.0%
Sales & office	16.8%
Natural resources & construction	2.0%
Production & transportation	2.8%

Employment type

Type	%
Private sector	82.8%
Government	8.3%
Self-employed	9.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	66.1%
Carpool	5.3%
Public transit	1.5%
Walk	2.0%
Work from home	24.4%
Other means	0.8%
Avg commute (minutes)	24.0

Poverty

All people 3.7%

Under 18 years 0.0%

18 and over 4.6%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	31.2%
Retirement income	30.2%
Supplemental Security	4.1%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	24.2%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	7.7%
Heart disease	5.9%
Stroke	2.3%
Asthma	8.2%
Arthritis	21.3%
Kidney disease	2.5%
Pulmonary disease	4.3%
Cancer	8.0%

Behavior / access	%
Smoking	8.2%
Binge drinking	16.1%
No physical activity	13.0%
Less than 7 hrs sleep	27.9%
Depression	17.3%
Fair or poor health	8.0%
Poor mental health	10.9%
Poor physical health	6.7%
No health insurance	7.4%
Visited doctor (checkup)	76.2%
Visited dentist	76.4%
Cholesterol screening	0.0%
Teeth loss	5.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	13	2.1%

Disability	%
Any disability	11.7%
Under 18	5.5%
18–64 years	11.7%
65 and over	18.1%

Health insurance coverage

Type	%
Private insurance	86.5%
Public insurance	25.8%
No insurance	1.4%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	736	92.7%
Spanish	46	6.3%
Other Indo-European	0	0.0%
Asian & Pacific Islander	41	5.6%
Other languages	5	0.7%

Place of birth & citizenship

Origin	Count	%
Native born (US)	671	84.5%
Born in same state	665	83.8%
Born in different state	345	43.5%
Foreign born	6	0.8%
Naturalized citizen	123	15.5%
Not a US citizen	86	69.9%

Ancestry

Ancestry	Count	%
Italian	97	12.2%
French	60	7.6%
Polish	24	3%

Ancestry	Count	%
Arab	22	2.8%
English	15	1.9%
German	7	0.9%

Technology access

Metric	% of households
Computer access	37.2%
Internet access	99.3%

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

Frequently asked questions about ZIP code 08553

What city is ZIP code 08553 in?

ZIP code 08553 is primarily assigned to Rocky Hill, New Jersey.

What county is ZIP code 08553 in?

ZIP code 08553 falls within Somerset County, New Jersey.

How educated is the population of ZIP code 08553?

77% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 08553 mostly owner-occupied?

86% of occupied units in ZIP code 08553 are owner-occupied, well above the national average.

What is the median household income in ZIP code 08553?

The median household income in ZIP code 08553 is $126,250, above the national median of ~$75,000.

What is the typical home value in ZIP code 08553?

The median home value in ZIP code 08553 is $587,000.

What timezone is ZIP code 08553 in?

ZIP code 08553 observes the EST timezone.