This Is Not a Government Office or Records Custodian. Ontario Residents Directory is a private reference. It cannot pull records, certify copies, confirm who lives at an address, or remove a name from a roll. Those requests belong with the office that holds the record. For an emergency, call 911. If you believe someone is stalking or harassing you, contact local police.
Need a Particular Ontario Record?
Use the path that matches the question instead of sending a general request to the reference site:
- Street or parcel: open the Ontario by-street directory.
- Old volumes or past households: use the Ontario city directory collections.
- One name to verify: follow the Ontario resident lookup.
- Delivery area: compare the Ontario ZIP directory with USPS and county GIS.
- Records not online: send a narrow request under the California Public Records Act to the named custodian.
Ontario City Clerk and Records Management
City Hall
303 East B Street
Ontario, CA 91764
For existing municipal records, use the Ontario GovQA request portal. The research source does not publish a direct phone or hours, so confirm current routing with City Hall.
San Bernardino County ARC Recorder-Clerk
Hall of Records
222 W. Hospitality Lane
San Bernardino, CA 92415
909-387-8306
ARC public-records request information; confirm current counter hours before visiting.
Model Colony History Room
Ovitt Family Community Library
215 E. C Street
Ontario, CA
909-395-2206
Mon-Wed 1-6, Thu 1-9, Fri 1-6; closed weekends. LocalHistory@OntarioCA.gov.
The library is the local contact for directories, biographies, yearbooks, newspapers, historic houses, and off-site manuscript boxes. Give at least one day's notice for off-site material and include collection and box numbers when known. For court, vital, voter, license, or deed corrections, contact the responsible county or state custodian directly.