Curt John Ducasse (French: [dykas]; 7 July 1881 – 3 September 1969) was a French-born American philosopher who taught at the University of Washington and Brown University.

His influence can be seen in the work of Roderick Chisholm and Wilfrid Sellars.

He joined the American Society for Psychical Research in 1951 and served a term as vice president beginning in 1966.

[6] Criticism came from philosopher Corliss Lamont who asserted that some of the content was based on wishful thinking.

Science writer Martin Gardner observed that Ducasse was notable for "combining nonbelief in God with a belief in the preexistence and the afterlife of human souls.