Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CT/ONECO

Oneco ZIP code, Connecticut

The ZIP code for Oneco, CT is 06373, and its area codes are 860 and 959.

USPS city name
1 ZIP code
Population
219
Area codes
860, 959

NANPA lists no telephone rate centre for Oneco itself, so these are the area codes of the nearest one, Plainfield (5.5 miles). A town on an area-code boundary can differ from its neighbour.

Oneco in numbers

About 219 people live in Oneco, in 99 households. The median owner-occupied home is valued at $270,800 (26% below the Connecticut median).

Population219Oneco219
Households99Oneco99
Median home value$270,800Oneco$270,800Connecticut$366,900US $332,700

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Oneco. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Oneco

ZIP codes with the USPS city name Oneco
ZIP City Type Population Median income Median home
06373 Oneco , CT Standard 219 — $270,800

Map of Oneco ZIP codes

06373

The ZIP codes of Oneco, CT, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Oneco

The nearest larger towns are Greene, RI (962 people, 4.2 mi), Moosup (2,885 people, 4.2 mi) and Plainfield Village (2,316 people, 6.2 mi).

Towns near Oneco
TownPopulationDistance
Moosup 2,885 4.2 mi
Danielson 4,209 9.3 mi
Jewett City 3,429 10.5 mi
Putnam 7,120 16.9 mi
Norwich 39,973 17.5 mi
Cranston, RI 83,250 17.5 mi
Greenville, RI 8,296 18.7 mi
Pascoag, RI 4,410 19.3 mi
Warwick, RI 83,175 19.9 mi
Kingston, RI 7,332 20.6 mi
Willimantic 18,096 21.1 mi
Westerly, RI 18,411 21.6 mi
Pawcatuck 5,577 21.7 mi
Providence, RI 191,767 22.1 mi

More nearby: every ZIP code in Windham County · Connecticut ZIP codes

Cite this page

zipcodes.pro. “Oneco, CT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ct/oneco

Underlying data is public domain or openly licensed — sources, vintages and licences.