Contra Costa County, CA Sex Offender Registry
As of August 2026, we index about 1,198 registrants with a Contra Costa County, CA address — about 10.3 per 10,000 residents. The figure is approximate and moves continuously — search below for the current picture on any specific person.
No code needed — type a name, get photographs and official registry records.
🎃 Trick-or-treating in Contra Costa County this Halloween?
Check the streets on your route for registered sex offenders before you go. Search any address and see who is registered nearby, with photos and official record links.
Contra Costa County sex offenders by the numbers
- About 1,198 registrants we index list a Contra Costa County address — about 1 in 973 residents.
- That is 10.3 per 10,000 residents, about 35% below the California average of 15.9.
- Contra Costa County holds about 2% of the registrants we index in California.
- It ranks 12th of the 28 California counties we publish pages for by number of registrants we index, and 23rd of 28 by rate per resident.
- Of the 3 Contra Costa County cities we publish pages for, Antioch has the most, at about 269.
Counts are registrants we index with a Contra Costa County address as of August 2026, rounded and approximate — not an official figure. Rates use 2020 Census population.
How Contra Costa County compares
Registrants we index per 10,000 residents, against the California and national averages. All three rows come from the same continuously updated dataset, so the comparison divides like by like.
| Area | Registrants we index | Per 10,000 residents |
|---|---|---|
| Contra Costa County, CA | 1,198 | 10.3 |
| California average | 62,895 | 15.9 |
| United States average | 1,563,010 | 47.2 |
Search Contra Costa County — and everywhere else at once
People move. A check limited to Contra Costa County misses a registration anywhere else, so a search here covers every US registry — the 50 states, DC and the territories — and lets you narrow to a Contra Costa County city or ZIP when that is the question. Every result is scored, carries its photographs, and links to the official registry record.
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Checking around a specific address? Search sex offenders near me by address or ZIP.
How a Contra Costa County sex offender search works
California's registry publishes a full date of birth, so if you know the person's birthday a match can be confirmed precisely. With a common name, a matching date of birth is the fastest way to tell two people apart.
Registries in California are kept at the state level, so there is no separate county registry to check. The state’s own public search is California Megan's Law (DOJ). California’s own search is organised county by county, so checking one name statewide means repeating the search one county at a time.
People move across county and state lines, so a Contra Costa County search is not bounded by the county line. It reaches California, its neighbours (Arizona, Nevada, Oregon) and every other US registry in the same pass — so someone who lived elsewhere before Contra Costa County still surfaces, which a single-county or single-state search would miss.
Checking an address in Contra Costa County
A county is a big area; the useful question is usually one street. Start from the address you care about — a home you are buying or renting, a school, a daycare, a relative’s house — or its ZIP code, and set the radius to match: a few blocks for one home, a mile or two for a neighborhood, or the whole of a Contra Costa County city such as Antioch, Richmond, Concord.
Each result is the full registry record — photograph, offenses, the address last reported and the official record link. Radius search sees registrants whose published address we have placed on a map coordinate, so search a name as well when you are checking a particular person.
Search by address or ZIP · Get a list for your area · How to read a record
Reading a Contra Costa County result
Each Contra Costa County result is one registry record: the registrant’s name and aliases, a photograph, the address they last reported, the offenses that carry a registration duty and their current registration status, usually with a physical description and often a risk level or tier.
Two things it is not. It is not a full criminal history — offenses that never required registration do not appear, which is what a criminal record search covers. And the address is where the person last reported living, not proof of where they are today, so check the record date and confirm the photograph before acting on it. How to read a record · Criminal record search
Contra Costa County offender search FAQ
How many registered sex offenders are in Contra Costa County?
As of August 2026, we index approximately 1,198 registrants with a Contra Costa County, CA address — about 10.3 per 10,000 residents, or about 1 in 973 residents. Treat the figure as scale rather than a fixed number: the registered population moves continuously as people are added, move, or are released from the requirement. When you need an answer about a specific person, run a search.
How does Contra Costa County compare with the rest of California?
Contra Costa County sits at about 10.3 registrants we index per 10,000 residents, against a California average of about 15.9 and a national average of about 47.2. Density varies block by block inside any county, so use the ratio as context — and a search, not an average, to answer about a specific address or person.
How do I check a specific person in Contra Costa County?
Type their last name and add whatever else you hold — first name, date of birth, or narrow to a Contra Costa County city or ZIP. You get scored matches with photographs and official record links, and the search covers every US registry at once, so someone now in Contra Costa County who was registered elsewhere still surfaces. Your first 25 searches are free, no card required.
How do I find sex offenders near a Contra Costa County address?
Search outward from a street address or ZIP within Contra Costa County. Each result is the full registry record — photograph, offense history and the official state link — and you can widen the radius from one mile to a hundred to cover a neighbourhood or the whole area. It is address-and-radius search rather than a map, and it sees registrants whose published address we hold and have placed on a coordinate.
Is there a Contra Costa County sex offender list?
Yes — the list for Contra Costa County is a search: we index about 1,198 registrants with a Contra Costa County address, and narrowing a search to the county, one of its cities, or a ZIP code returns them with photographs and official record links. To keep an eye on a specific area rather than read a long list, search outward from an address instead.
Which Contra Costa County city has the most registered sex offenders?
Among the 3 Contra Costa County cities we publish pages for, Antioch has the most registrants we index, at about 269. Larger cities usually have larger counts, so the per-10,000 column in the city table is the fairer comparison.
Can I get alerts about sex offenders in Contra Costa County?
Yes. A location monitor watches an address and radius you choose in Contra Costa County and emails you when someone registered nearby is added or moves in, so you don't have to re-run the same search.
Is this the official Contra Costa County sex offender registry?
Registries are maintained per state, not per county, so no single official "Contra Costa County registry" list exists. What you search here is our continuously updated national dataset with every US registry in one place, and each record links back to the official state entry that published it — so you can verify any Contra Costa County result at its source.
Standard results are not a consumer report; FCRA-covered decisions run through FCRA Partner Access, our separately enabled regulated service.
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<a href="https://offendersearch.app/sex-offender-registry/california"><img src="https://offendersearch.app/badge/state/ca.svg" alt="California registered sex offenders — Offendersearch" height="40"></a>Get alerts for Contra Costa County, CA
We'll email you when a registered offender is added or moves near your Contra Costa County, CA address. A monitor is a recurring watch on our continuously updated data, checked every morning — set one on an address and radius, or on one person by name and date of birth.
Area monitoring is $10/mo; watching one person by name is $3/mo. Send the alerts to yourself and anyone else who should know, and turn a monitor off any time.
This is not a consumer report and must not be used for FCRA-governed hiring, tenancy, or credit decisions — those run through FCRA Partner Access.