Trivia

Due to many budget cutbacks following the death of Irving Thalberg many stock shots from former movies were used.

Tarzan's Secret Treasure (1941) was based on the character created by Edgar Rice Burroughs. It is the fifth in the MGM Tarzan series to star Johnny Weissmuller and Maureen O'Sullivan. The next film in the series would be Tarzan's New York Adventure (1942), the last in the series to feature O'Sullivan, and the last before the series moved to RKO.

It was with Tarzan's Secret Treasure (1941) in the series where Cheeta began to move mainly beyond stealing scenes to having entire scenes of her own, some of them lasting two to three minutes apiece. Also, her pranks and mischief began to elevate into wilder and more destructive patterns, typified by the following year's entry, Tarzan's New York Adventure (1942).

Jane returns to having bare feet at all times, after sporting shoes throughout the previous film.

The director, Richard Thorpee, said Louis B. Mayer asked him to make shots of Tarzan's face and body more than for Jane's. Mayer also asked Thorpe to make Weissmuller look much like Rudolph Valentino. He told Thorpe to make whatever he wished concerning Jane's character.