ZIP Code · CT

ZIP 06820

Part of Darien, CT

Pop. 21,936·Fairfield County·2nd most expensive ZIP in Connecticut

Median rent (all units)

$5,634/mo

Year-over-Year

Stable

Month-over-Month

+0.7%

vs US Median

+$3,702

Reported rents

Rising (Monthly)

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Most AffordableMost Expensive

ZIP 06820 · $5,634

More expensive than 99% of US ZIP codes · National median $1,932/mo

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Compare your rent to the local median.

Medians by bedroom

Rent by unit size

Studio

$2,430

1 BR

$2,940

2 BR

$3,530

3 BR

$4,300

4 BR+

$4,790

Research median

$3,530/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: October 17, 2026

From the history

What the numbers show

What a typical income covers

30% of the median household income ($250,001) is $6,250 a month. That covers HUD's Fair Market Rent for up to a 4-bedroom ($4,790).

Cheaper nearby

ZIP 06906, 2 miles away, rents for 50% less ($2,803/mo), about $34,000 a year in savings.

From Zillow's monthly rent index (ZORI) for ZIP 06820. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$67,608/yr

At $5,634/mo median

Location

CityDarien

StateCT

CountyFairfield County

Rent Market Meter

Balanced Market

Renter's MarketBalancedLandlord's Market

Rents are roughly steady, with neither renters nor landlords holding a strong edge right now.

Based on rent-price momentum (+0.0% YoY, +0.7% MoM), not inventory.

Demographics

Who lives here

ZIP 06820 (Darien, CT) is majority owner-occupied, has a large share of families with children, has a median income above the national average, 85.9% of residents hold a bachelor's degree or higher.

Population

21,936

Median income

$250,001

Median age

Renters

17.6%

Age distribution

30.9%

13.7%

30.4%

13.7%

Under 1830.9%

18–3413.7%

35–5430.4%

55–6411.3%

65+13.7%

Gender

49.4%

50.6%

Male49.4%

Female50.6%

Race & ethnicity

81.5%

White81.5%

Black0.6%

Hispanic5.8%

Asian7.4%

Other4.7%

Education (25+)

85.9%

No HS diploma1.5%

HS diploma4.8%

Some college7.8%

Bachelor's+85.9%

Housing tenure

82.4%

17.6%

Owner82.4%

Renter17.6%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 06820 in Darien, CT has changed in 5 years

Income

$250,001 → $250,001

up 0.0%

Population

21,485 → 21,936

up 2.1%

Renter share

14% → 17.6%

+3.6 pts

Bachelor's+

85.7% → 85.9%

+0.2 pts

Local incomes tracked alongside that move, going from a median of $250,001 in 2021 to $250,001 more recently. Census counts show ZIP 06820 in Darien, CT adding about 451 residents over the five-year window, up 2.1% on net. The renter share has risen from 14% to 17.6%, with owner-occupied housing accounting for the remainder.

Community

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Local insights

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About renting in ZIP 06820

Last updated: October 17, 2026

ZIP code 06820 covers Darien, CT. The median rent here is $5,634/mo as of October 2026. A 1-bedroom rents for a median of $2,940/mo. A 2-bedroom rents for a median of $3,530/mo.

At 27% of local median household income ($250,001/yr), ZIP 06820 ranks as affordable compared to the national benchmark of 30%. Rent prices have stayed steady over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 06820?

To keep rent at or below 30% of gross income, you would need to earn at least $225,000/year (about $108/hour full-time) to afford the median rent of $5,634/mo in ZIP 06820. The local median household income is $250,001/yr, so the typical household meets that bar.