Darien is a town in Fairfield County, Connecticut, home to about 21,936 people across 13 square miles. Its ZIP code is 06820.
Homes sold for a median of $811 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Darien. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Darien’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | LaGuardia Airport (LGA)29 miles away |
|---|---|
| Closer regional airport | Westchester County Airport (HPN)12 miles away |
| Nearest city of 250,000+ | New York, NY37 miles away |
Straight-line distances from the center of Darien; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Darien had 21,499 residents in the 2020 census, up 10% since 2000.
It’s the 53rd largest of 169 towns in Connecticut by population.
Fairfield County grew from 184,203 residents in 1900 to 957,419 in 2020.
Fairfield County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 22°F. About 51.5 inches of rain and melted snow fall in a typical year, with about 34 inches of snow.
Source: NOAA 1991–2020 climate normals, Stamford 5 N, CT weather station (5 miles away).
300 doctors and other health care providers list an office in Darien.
Nearest hospitals
Providers with an office here
| Primary care doctors | 32 |
|---|---|
| Specialist doctors | 31 |
| Dentists | 16 |
| Nurse practitioners and physician assistants | 26 |
| Mental health providers | 127 |
| Physical and occupational therapists | 54 |
| Optometrists | 5 |
| Chiropractors | 9 |
| Pharmacies | 4 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (25 nearby)
Grocery stores (6 nearby)
Pharmacies (1 nearby)
Libraries (5 nearby)
Museums (1 nearby)
Theaters and performance venues (1 nearby)
Counts are within about 2.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Darien School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Hindley Elementary SchoolDarien | Pre-K–5 | 411 | Public | 1.2 mi |
| Holmes Elementary SchoolDarien | Pre-K–5 | 407 | Public | 1.4 mi |
| Ox Ridge Elementary SchoolDarien | Pre-K–5 | 625 | Public | 1.8 mi |
| Royle Elementary SchoolDarien | Pre-K–5 | 342 | Public | 0.9 mi |
| Tokeneke Elementary SchoolDarien | Pre-K–5 | 439 | Public | 1.4 mi |
| Middlesex Middle SchoolDarien | 6–8 | 1,043 | Public | 0.7 mi |
| Darien High SchoolDarien | 9–12 | 1,382 | Public | 0.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.