Welcome to the City of Ontario's component of the California Historical Resources Inventory Database (CHRID) Program. The CHRID promotes and protects cultural heritage through documenting and sharing information on historical resources. CHRID was developed through the California State Office of Historic Preservation's Certified Local Government (CLG) Grant Program and partially funded through the Federal Historic Preservation Fund Program.

This site provides public access to historical resource information that has been entered into the CHRID by local governments. This site is maintained and hosted by the City of Ontarioand contains information on historic resources within the local jurisdiction.