How to search for sex offenders in Wisconsin
Two ways to check the Wisconsin sex offender registry: manually on the official state site, or programmatically across Wisconsin and every other US registry with a single API call.
Option 1 — Search the official Wisconsin registry
- Open the official Wisconsin 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 Wisconsin 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 Wisconsin with the Offendersearch API
One authenticated request queries the Wisconsin 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": "WI" },
"jurisdictions": ["WI", "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.
Wisconsin search FAQ
Is searching the Wisconsin sex offender registry free?
Searching the official Wisconsin public registry directly is free. The Offendersearch API is for teams that need programmatic, scored, multi-source results across Wisconsin and every other jurisdiction in one call.
Can I search sex offenders near an address in Wisconsin?
Yes. Provide a city, ZIP, or latitude/longitude with a radius and the API returns registrants near that location in Wisconsin, each scored and tagged with its source.
How current is Wisconsin registry data?
Every record returns a lastCheckedAt timestamp. Choose the Standard, Weekly, or Daily freshness tier depending on how recently Wisconsin data must have been re-verified.