Olof Thiel (October 31, 1892 – December 10, 1978) was a Swedish film producer, film production manager, and composer.

His father Ernest created the Thiel Gallery (Thielska galleriet) art museum,[8] which is one of the foremost museums in Stockholm.

Otto Thiel's daughter Madeleine Uggla was a singing teacher and the mother of the actor Magnus Uggla.

Thiel was one of the directors of the company Filmaktiebolaget Biörnstad & Thiel, and he started the film company AB Irefilm.

[3][9] He composed the music for almost all of Irefilm's film productions.