How to search for sex offenders in Massachusetts
Two ways to check the Massachusetts sex offender registry: manually on the official state site, or programmatically across Massachusetts and every other US registry with a single API call.
Option 1 — Search the official Massachusetts registry
- Open the official Massachusetts sex offender registry public search.
- Search by last name (required), first name, or by city / ZIP / address.
- Open a result to see offenses, registration status, and known addresses.
- Note the record URL — it’s the authoritative source for that person.
The public Massachusetts site is best for a one-off, manual lookup. It won’t scale to bulk screening or cover other states in one search.
Option 2 — Search Massachusetts with the Offendersearch API
One authenticated request queries the Massachusetts registry plus the national NSOPW source, de-duplicates people across sources, scores each match, and returns provenance and freshness on every record.
POST /v1/search
{
"query": { "lastName": "Doe", "state": "MA" },
"jurisdictions": ["MA", "NSOPW"],
"locationScoped": true,
"freshness": "standard"
}This is a live demo of the API shape returning sample data. Real, scored results across every registry require a free account with billing enabled.
Massachusetts search FAQ
Is searching the Massachusetts sex offender registry free?
Searching the official Massachusetts public registry directly is free. The Offendersearch API is for teams that need programmatic, scored, multi-source results across Massachusetts and every other jurisdiction in one call.
Can I search sex offenders near an address in Massachusetts?
Yes. Provide a city, ZIP, or latitude/longitude with a radius and the API returns registrants near that location in Massachusetts, each scored and tagged with its source.
How current is Massachusetts registry data?
Every record returns a lastCheckedAt timestamp. Choose the Standard, Weekly, or Daily freshness tier depending on how recently Massachusetts data must have been re-verified.