Darien ZIP Codes — Fairfield County, CT

There is one unique ZIP code in Darien, Connecticut and it is 06820. Area code: 203/475.

ZIP codes

12.65

sq mi land

2.18

sq mi water

203/475

area code

Darien, CT ZIP code map

About Darien, CT

Darien is a tranquil and affluent town located in the southwestern part of Connecticut. Nestled in Fairfield County, it is renowned for its picturesque coastal views along Long Island Sound. With a strong sense of community and an emphasis on quality of life, Darien attracts residents seeking both serenity and convenience.

Location & geography

Darien is strategically situated along the Connecticut coastline, approximately 10 miles from Stamford and 12 miles from Norwalk. The town covers a total area of 14.83 square miles, which includes 12.65 square miles of land and 2.18 square miles of water. The beautiful terrain features beaches and parks, making it a delightful place for outdoor activities.

Community & economy

The character of Darien is marked by its family-friendly atmosphere, outstanding public schools, and a variety of local businesses. The town's economy thrives on industries such as retail, healthcare, and professional services. Residents enjoy a high quality of life, often spending their leisure time at the local beaches, parks, and the Darien YMCA.

Transportation

Darien is conveniently located near Interstate 95, which provides easy access to both New York City and New Haven. The nearest major airport is Westchester County Airport, located approximately 20 miles to the north. Public transportation is available through the Metro-North Railroad, connecting residents to the larger metropolitan area.

History

Darien was first settled in 1641 and was officially incorporated in 1820. The town originally thrived on agriculture and shipbuilding before transitioning into a suburban residential area in the 20th century. Notable events include its development as a summer retreat for wealthy New Yorkers during the 1800s.

Did you know?

One surprising fact about Darien is that it boasts some of the most expensive real estate in the nation. Additionally, the town has a rich array of cultural events throughout the year, including popular town festivals and art shows.

ZIP codes for Darien, CT (1)

ZIP code	City	County	Map
06820	Darien	Fairfield	View map

Demographics & statistics

21,571

Population

39.5

Median age

$250,001

Median household income

$147,195

Per capita income

$1,601,600

Median home value

$3,484

Median monthly rent

84.7%

Home ownership

5.4%

Poverty rate

5.0%

Unemployment

6,436

Housing units

85.1%

Bachelor's or higher

Age distribution

Male Female

709

Under 5

709

979

5–9

979

1,069

10–14

1,069

941

15–19

941

384

20–24

384

672

25–34

672

1,536

35–44

1,536

1,770

45–54

1,770

556

55–59

556

781

60–64

781

824

65–74

824

324

75–84

324

245

85+

245

← Male

Female →

Age summary

Group	Count	%
Under 18	6,786	31.5%
18 and over	14,785	68.5%
65 and over	2,785	12.9%
Median age	39.5 years

Race & ethnicity

White 79.4%

Asian 6.4%

Two or more races 6.4%

Hispanic or Latino 4.8%

Black or African American 1.5%

Other race 1.4%

American Indian / Alaska Native 0.1%

Group	Count	%
White	18,002	79.4%
Asian	1,452	6.4%
Two or more races	1,446	6.4%
Hispanic or Latino	1,088	4.8%
Black or African American	330	1.5%
Other race	324	1.4%
American Indian / Alaska Native	17	0.1%

Household income

Under $10k 2.0%

$10k–$15k 2.9%

$15k–$25k 1.9%

$25k–$35k 1.9%

$35k–$50k 2.8%

$50k–$75k 3.3%

$75k–$100k 3.9%

$100k–$150k 8.9%

$150k–$200k 7.6%

$200k+ 64.8%

Range	% of households
Under $10k	2.0%
$10k–$15k	2.9%
$15k–$25k	1.9%
$25k–$35k	1.9%
$35k–$50k	2.8%
$50k–$75k	3.3%
$75k–$100k	3.9%
$100k–$150k	8.9%
$150k–$200k	7.6%
$200k+	64.8%
Median income	$250,001

Housing

Home values

Under $50k 1.1%

$50k–$100k 0.2%

$100k–$150k 0.6%

$200k–$300k 0.4%

$300k–$500k 0.5%

$500k–$1M 20.0%

$1M+ 77.0%

Housing overview

Metric	Value
Median home value	$1,601,600
Median rent / month	$3,484
Owner occupied	84.7%
Renter occupied	15.3%
Vacant	5.4%
Single-family detached	85.9%
Large apartment buildings	2.5%
Mobile homes	0.0%
Median rooms	8.4
Avg household size (owned)	3.19

Year built

Era	%
2020 or later	0.7%
2010–2019	8.7%
2000–2009	10.0%
1990–1999	4.6%
1980–1989	5.2%
1970–1979	6.0%
1960–1969	7.1%
1950–1959	18.4%
1940–1949	9.3%
1939 or earlier	30.0%

Bedrooms

Size	% of units
No bedroom (studio)	2.7%
1 bedroom	4.5%
2 bedrooms	8.0%
3 bedrooms	21.0%
4 bedrooms	35.2%
5+ bedrooms	28.5%

Vehicles per household

Vehicles	% of households
No vehicle	1.5%
1 vehicle	23.0%
2 vehicles	45.4%
3 or more	30.1%

Heating fuel

Fuel type	%
Utility gas	11.6%
Electricity	8.2%
Propane / LP gas	10.7%
Fuel oil	67.3%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	5,162	72.5%
Cohabiting couple	57	0.8%
Male householder, no spouse	510	7.2%
Female householder, no spouse	1,387	19.5%
Households with children under 18	3,278	46.1%
Households with seniors (65+)	1,990	28.0%
Average household size	3.02

Marital status

Status	Male	Female
Never married	26.9%	22.7%
Married	68.7%	61.5%
Separated	0.2%	2.9%
Widowed	1.4%	6.2%
Divorced	2.8%	6.7%

Education

Less than 9th grade 1.3%

Some HS, no diploma 0.8%

HS graduate 4.3%

Some college, no degree 6.2%

Associate's degree 2.3%

Bachelor's degree 47.8%

Graduate / professional 37.3%

Metric	%
HS diploma or higher	97.9%
Bachelor's or higher	85.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	682	9.9%
Kindergarten	392	5.7%
Elementary school	3,273	47.6%
High school	1,744	25.4%
College / grad school	778	11.3%

Employment

Industry of employment

Finance & real estate 36.8%

Professional & management 18.0%

Education & healthcare 14.1%

Retail trade 7.6%

Arts, food & hospitality 4.1%

Manufacturing 3.4%

Construction 3.1%

Other services 3.1%

Information 2.9%

Public administration 2.7%

Wholesale trade 2.5%

Transportation & utilities 1.4%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	65.2%
Service	5.0%
Sales & office	25.9%
Natural resources & construction	2.7%
Production & transportation	1.2%

Employment type

Type	%
Private sector	87.1%
Government	5.0%
Self-employed	7.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	39.1%
Carpool	5.1%
Public transit	23.0%
Walk	2.1%
Other means	1.3%
Avg commute (minutes)	39.3

Poverty

All people 5.4%

Under 18 years 5.5%

18 and over 5.4%

Married-couple families 1.8%

Female-led households 15.1%

Income support

Source	% of households
Social Security	22.9%
Retirement income	21.7%
Supplemental Security	1.6%
Cash public assistance	0.7%
Food stamps / SNAP	0.7%

Health indicators

Condition	%
High blood pressure	25.0%
High cholesterol	31.3%
Heart disease	4.3%
Stroke	1.8%
Asthma	8.1%
Arthritis	19.0%
Kidney disease	2.1%
Pulmonary disease	3.5%
Cancer	7.3%

Behavior / access	%
Binge drinking	16.7%
No physical activity	11.4%
Less than 7 hrs sleep	27.4%
Fair or poor health	6.4%
Poor mental health	10.4%
Poor physical health	6.3%
No health insurance	5.8%
Visited doctor (checkup)	75.0%
Visited dentist	81.6%
Cholesterol screening	95.2%
Teeth loss	4.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	612	4.1%

Disability	%
Any disability	4.2%
Under 18	1.3%
18–64 years	2.1%
65 and over	20.2%

Health insurance coverage

Type	%
Private insurance	90.2%
Public insurance	16.6%
Uninsured under 19	2.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	20,154	93.4%
Spanish	534	2.6%
Other Indo-European	111	0.6%
Asian & Pacific Islander	164	0.8%
Other languages	252	1.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	19,113	88.6%
Born in same state	18,463	85.6%
Born in different state	7,194	33.4%
Foreign born	650	3.0%
Naturalized citizen	2,458	11.4%
Not a US citizen	1,529	62.2%

Ancestry

Ancestry	Count	%
Italian	5,046	23.4%
French	3,573	16.6%
Arab	1,445	6.7%
Irish	444	2.1%
English	320	1.5%

Ancestry	Count	%
Polish	216	1%
German	134	0.6%
Norwegian	109	0.5%
Dutch	71	0.3%

Technology access

Metric	% of households
Computer access	33.0%
Internet access	98.0%

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

Frequently asked questions

What ZIP codes does Darien, CT have?

Darien, CT has one ZIP code: 06820. Each ZIP code serves a distinct delivery area within the city and surrounding region.