Caddo County, OK Genweb Project a collection of online resources for genealogy researchers
Caddo County Message Board read and post messages with other genealogy researchers of this county
Caddo Co. Genealogy Forum read and post messages about your ancestors for this county
Caddo County, Oklahoma Obits
The Tombstone Transcription Project - cemeteries for Caddo Co. OK
US GenWeb Archives for Caddo County cemeteries, newspapers, wills, military rosters etc recorded online
World War II Honor List of Dead and Missing Army and Army Air Forces Personnel - Caddo County page 1 and page 2

Additional Resources

Oklahoma Newspaper Search enter your ancestor's name to instantly search the world's largest newspaper archive; over 12 million newspaper pages
Oklahoma Birth Records
Oklahoma Marriage Records
Oklahoma Divorce Records
Oklahoma Death Records