Although uncredited, the title song was sung by Mike Stewart, and later recorded by Frankie Laine. It was written by Marilyn Bergman and Norman Luboff.
"Champion the Wonder Horse! Champion the Wonder Horse!
Like a streak of lightnin' flashin' cross the sky,
Like the swiftest arrow whistlin' from a bow,
Like a mighty cannonball he seems to fly.
You'll hear about him everywhere you go.
The time'll come when everyone will know
(Up to episode 2, this line is "I wish there's not a man who doesn't know")
The name of Champion the Wonder Horse!"
The version recorded by Frankie Laine contains an additional verse, and repeats the chorus. (According to YouTube, Laine had intended to record an album for children, but this was never completed.) Laine's version was recorded on the Philips label, with Paul Weston and his Orchestra.