Yes, the Caddo Indians are still alive today. They are recognized by the United States government as the Caddo Nation of Oklahoma and the Caddo Tribe of Oklahoma. The Caddo Nation is located in Caddo County, Oklahoma, while the Caddo Tribe is located in Grady County, Oklahoma. The two tribes have a combined population of about 5,000 people. The Caddo are descended from the Caddo Confederacy, which was a group of Native American tribes that lived in the Southern United States from the 9th to the 19th centuries. The Caddo were known for their advanced culture, which included a complex political system, a well-developed economy, and a rich religious tradition. Today, the Caddo continue to live in Oklahoma and maintain their cultural heritage. They are active in preserving their language, traditions, and way of life.