Black Book Online Select "State Records" Select "Oklahoma" Searchable by real estate address or owner name Personal/business look-ups, etc.

Oklahoma DHS Adoption Reunion Registry

How to Obtain Oklahoma Birth or Death Certificate

Oklahoma Marriage Database

Ohio Genweb

Ancestry.com Oklahoma Databases
Subscription service contact your local library for online access
Oklahoma Territorial Census, 1890 and 1907
Payne County, Oklahoma Census, 1920
Muskogee County, Oklahoma Census, 1910