ZIP Code 06870 — Old Greenwich CDP, CT Demographics & Data

ZIP code 06870 covers Old Greenwich, CT in Fairfield County with a population of about 7,903.

At a glance, the area shows median age of 39.9 (near the U.S. median).

It sits in telephone area codes 203, 475; U.S. House district CT-4; the NEW YORK media market.

Old Greenwich, CT aligns with a tech / corporate-campus profile (high remote-work / education / income profile or known campus context). Broadband quality, remote-work share, and nearby employer campuses often matter as much as classic residential stats.

Median household income in ZIP 06870 is about $227,727 — about 203% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 3.2%; unemployment rate near 4.2%; 83.3% of adults with a bachelor’s degree or higher (about 49.6 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Finance and insurance, Professional services, and Healthcare; about 33.3% of workers reporting work-from-home (about 18.1 points above the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $1,579,200 — about 354% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $3,500 (about 201% above the U.S. median rent ($1,163)), and owner-occupancy near 82.2% (about 16.8 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 06870 in Old Greenwich, CT, a household would need roughly $435,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $10,144. That is about 91% above the local median household income ($227,727), so the median earner would likely stretch or need a larger down payment. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

Climate normals for Old Greenwich CDP, CT show little to no average snow and around 51.6 inches of annual precipitation.

IRS migration statistics show a net inflow of about 436 for ZIP 06870 (Old Greenwich CDP, CT) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.