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zipcodes.pro — CITY/MA/ONSET

Onset ZIP code, Massachusetts

The ZIP code for Onset, MA is 02558, and its area codes are 508 and 774.

USPS city name
1 ZIP code
Overlapping the city
2 more
Population
1,380
Area codes
508, 774

NANPA lists no telephone rate centre for Onset itself, so these are the area codes of the nearest one, Wareham (2.5 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Onset uses the ZIP code above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Onset in numbers

About 1,380 people live in Onset, in 607 households. The median household income is $137,997 a year, 33% above the Massachusetts median of $103,960 (US: $80,734). The median owner-occupied home is valued at $408,300 (27% below the Massachusetts median). The median age is 34.4; 28.6% of adults 25 and over hold a bachelor's degree or higher (47.3% across Massachusetts); the average commute takes 15 minutes.

Population1,380Onset1,380
Households607Onset607
Median age34.4Onset34.4Massachusetts40.0US 38.9
Median household income$137,997Onset$137,997Massachusetts$103,960US $80,734
Median home value$408,300Onset$408,300Massachusetts$562,100US $332,700
Bachelor's degree or higher28.6%Onset28.6%Massachusetts47.3%US 35.7%
Mean commute14.9 minOnset14.9 minMassachusetts29.1 minUS 26.4 min
Population density1,280 / sq miOnset1,280 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Onset CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Onset

ZIP codes with the USPS city name Onset
ZIP City Type Population Median income Median home
02558 Onset , MA Standard 1,734 $79,598 $441,700

Other ZIP codes overlapping Onset

These ZIP codes cover part of Onset but are addressed as somewhere else.

ZIP codes overlapping Onset
ZIP City Type Population Median income Median home
02538 East Wareham , MA Standard 4,074 $123,750 $392,000
02571 Wareham , MA Standard 11,258 $94,265 $441,900

Map of Onset ZIP codes

02558

The ZIP codes of Onset, MA, 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 Onset

The nearest larger towns are Wareham Center (3,635 people, 2.7 mi), Buzzards Bay (2,909 people, 2.7 mi) and Bourne (1,806 people, 2.9 mi).

Towns near Onset
TownPopulationDistance
Wareham Center 3,635 2.7 mi
Buzzards Bay 2,909 2.7 mi
Monument Beach 3,277 4.0 mi
North Falmouth 2,838 7.4 mi
Sagamore 4,072 7.5 mi
Mattapoisett Center 2,669 8.5 mi
Sandwich 2,890 8.8 mi
Forestdale 3,801 9.2 mi
The Pinehills 5,282 11.0 mi
East Sandwich 3,864 12.3 mi
Acushnet Center 2,810 13.0 mi
East Falmouth 6,245 13.5 mi
Falmouth 3,954 13.8 mi
Plymouth 7,918 14.7 mi

More nearby: every ZIP code in Plymouth County · Massachusetts ZIP codes

Cite this page

zipcodes.pro. “Onset, MA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ma/onset

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