Ranger Bill is a Christian radio adventure serial from the 1950s produced by Moody Radio. Set in the small Rocky Mountain town of Knotty Pine, it stars Miron Canaday as Bill Jefferson, a chief forest ranger and former US Marine. Along with his friends Stumpy Jenkins, teenage ward Henry Scott, and Native American ranger Gray Wolf, Ranger Bill faces various challenges that stress positive Christian values for young audiences.

Originally airing in 1950 as 15-minute episodes, the show later shifted to a 30-minute format between 1954 and 1964. Featured characters include rangers, police, lumberjacks, and members of the local community. With its engaging stories and timeless themes, Ranger Bill continues to air even today through syndication, captivating listeners on the Children's Sonshine Network and His Kids Radio.