ZIP Code 06870

06870 is one of Connecticut's ZIP codes, delivering to addresses in Old Greenwich, Western Connecticut Planning Region.

City: Old Greenwich
Planning region: Western Connecticut Planning Region
State: Connecticut
Prefix: 068xx

Where this code sits

06870 is part of the 068xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Old Greenwich.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 06870 delivers to without sharing its boundary.

ZIP codes nearest 06870

The ZIP codes whose reference points sit closest to 06870.
ZIP code	Distance	Delivers to
ZIP code 06910	0.5 mi	Stamford, CT
ZIP code 06878	0.7 mi	Riverside, CT
ZIP code 06926	1.5 mi	Stamford, CT
ZIP code 06921	1.8 mi	Stamford, CT
ZIP code 06807	1.8 mi	Cos Cob, CT
ZIP code 06901	1.9 mi	Stamford, CT
ZIP code 06904	1.9 mi	Stamford, CT
ZIP code 06911	1.9 mi	Stamford, CT

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 06870, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 06870. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.