PlainZIP

Old Greenwich, CT

Single-footprint Census roll-up for Old Greenwich, CT: 1 USPS ZIP, population 7,316. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet OLD-GREENWICH-CT · Old Greenwich, CT 1 ZIPs · 7,316 pop · #96/25278 · Fairfield County

INC-TOP · RANK-TOP · PHOTO-FINISH · BOOK-ONE · OWN-MID · POP-TOWN · SPREAD-UNK · HOME-TOP

  • INC-TOP $250,001
  • RANK-TOP #96/25278
  • PHOTO-FINISH ≈ Westport
  • BOOK-ONE 1 ZIP
  • OWN-MID 84% owners
  • POP-TOWN 7,316
  • SPREAD-UNK Single-ZIP book
  • HOME-TOP $1,788,700

Nearest income peer: Westport, CT (+ $0 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Old Greenwich

Lowest/highest poles plus county-sharing cities nearest Old Greenwich on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Old Greenwich, CT sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 1%
household income vs 25,278 US cities
7,316
city population (Census)
1
USPS ZIP codes covered
$250,000+
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $250,000+ and home value $1,788,700 should be read as near-neighborhood numbers ; bachelor's attainment averages 85.4%.

Owner-occupancy sits in a mixed band (83.9%) - check the ZIP page's tenure split before treating Old Greenwich as a pure owner town.

Within Connecticut, Wilton is the closest lower-income city by average ZIP household income. Its 1 ZIP footprint is the immediate statewide comparison for Old Greenwich.

Population concentration

Old Greenwich reads through its lone ZIP, 06870

7,316 ACS residents, one ZIP: 06870 is not the leading code inside Old Greenwich, it is the only one on file. Treat the ZIP page as the primary source for anything below the city-wide total.

Census ZBP business roll-up

Dense ZBP book packed into Old Greenwich's one ZIP

Citywide ZBP: 242 establishments, 2,476 employees , annual payroll $448,441k (~33 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 06870 (242 units) ; leading NAICS Professional, scientific, and technical services (43) · also Health care and social assistance · Finance and insurance .

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ZIP Codes in Old Greenwich, CT

These ZIP codes sit in Fairfield County, which covers 47 ZIP codes in all; 1 of them fall in Old Greenwich. See the Fairfield County roll-up →

No other city sharing Fairfield County reports a higher average ZIP median income than Old Greenwich. Bridgeport, Stamford and Norwalk sit below it, so a household comparing this county on income alone starts here. Bridgeport marks the far end of that range at $54,494, 78% below Old Greenwich.

ZIP Code Population Median income Establishments Density
06870 7,316 $250,000+ 242 1,231
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Old Greenwich roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Old Greenwich, .