The Richmond Hill Central Library houses the collection of the York Region Branch of the Ontario Genealogical Society (OGS). The collection includes genealogy newsletters from Canada, the United States, and Great Britain, transcriptions of York Region cemeteries, and published works of genealogical interest.

The book collection is accessible by searching the library catalogue. Library call numbers for OGS material end in "OGS" and material is shelved in a separate area facing the east wall. A detailed description of the holdings in this collection is available from the OGS, York Region Branch website.

As with all other resources in the Local History and Genealogy Room, OGS material is for reference use only and does not circulate.