* Silent films: There were several silent Tarzan films starting in 1918.
* Sound films: The famous Johnny Weissmuller films are among the most popular sound films.
* TV series: Several Tarzan TV series aired, most notably the one starring Ron Ely.
* Animated films: There were animated Tarzan movies produced by Disney and other studios.
* Modern films: There have been more recent live-action Tarzan films starring Christopher Lambert and Casper Van Dien.
It's difficult to give an exact number as the definition of a "Tarzan film" can be broad, and there are many adaptations, spin-offs, and reboots. However, the number of Tarzan films is definitely impressive, showcasing the enduring popularity of the character.