Onset, MA ZIP Codes
2 ZIP codes serve Onset, Massachusetts: 02538 and 02558. Together they are home to 5,808 residents in 2,439 households. That is more than the 1,380 people counted inside Onset Census-designated place, because these ZIP codes reach past its boundary. Median household income ranges from $79,598 in 02558 to $123,750 in 02538.
Onset Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 1,380 |
| Households | 607 |
| Median household income | $137,997 |
| Median home value | $408,300 |
| Median age | 34.4 |
| Median rent | not published |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 5,808 |
| Households (sum of ZIP codes) | 2,439 |
| Median household income, range across ZIP codes | $79,598 (02558) to $123,750 (02538) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $107,621 |
| Homeowners | 84.0% |
| Households with kids under 18 | 24.8% |
| Moved in the past year | 14.0% |
| Carrier routes in EDDM2GO's route library | 3 routes, 1,992 homes (1 of 2 ZIP codes) |
Top facts
- Highest median household income in Onset: 02538 ($123,750)
- Most residents: 02538 (4,074 people)
- Highest homeownership: 02558 (87.1% own their home)
- Most households with kids: 02538 (28.6% of households)
- Most new movers: 02558 (28.4% moved in last year)
- Youngest median age: 02538 (41.1 years)
- Highest median home value: 02558 ($441,700)
Every ZIP code in Onset
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 02538 | East Wareham | 4,074 | 1,548 | $123,750 | $392,000 | 82.2% | 28.6% | 7.9% | 3 | 2,114 | 4% of its land |
| 02558 | Onset | 1,734 | 891 | $79,598 | $441,700 | 87.1% | 18.2% | 28.4% | — | — | 70% of its land; mailing city |
A ZIP code is listed for Onset when at least 10% of its land lies inside the Onset Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Onset. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Onset.
Counties
- Plymouth County — 36 ZIP codes
Price a mailing to Onset ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Onset, MA?
- 02538 and 02558. A ZIP code is listed for Onset when at least 10% of its land lies inside the Onset Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Onset.
- What is the population of Onset, MA?
- The Census Bureau counts 1,380 residents inside Onset Census-designated place (ACS 2020–2024). The 2 ZIP codes that serve Onset hold 5,808 residents in all.
- What is the median household income in Onset, MA?
- $137,997 inside Onset Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $79,598 to $123,750.
- Which Onset ZIP code has the highest median household income?
- 02538, at $123,750, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Onset, MA?
- For the 1 of 2 ZIP codes in EDDM2GO's stored route library: 3 carrier routes reaching 1,992 residential and 117 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.