Paul F. Johner (10 September 1887, in Zürich, Switzerland – 25 October 1938, in Berlin, Germany) was a Swiss chess master.
He was individual best alongside Rudolf Spielmann at the strong Scheveningen tournament 1923, organised to celebrate 50th anniversary of The Royal Chess Federation, above players like Richard Réti, Géza Maróczy, Jacques Mieses, Edgar Colle, Frederick Yates, or young Max Euwe (20 players).
Paul Johner triumphed at the Trieste International Festival 1923 (organized as a singular invitation tournament), finishing clear first in the top group ahead of 2.
Paul Johner also took the Berlin 1924 tournament, a Quadrangular, ahead of Akiba Rubinstein, Richard Teichmann, and Jacques Mieses.
According to the retrospective (historical) chessmetrics ratings, Paul Johner was ranked in January 1921 as number 10 in the world.