Carl August Liner (8 June 1871, St. Gallen - 20 March 1946, Appenzell) was a Swiss painter, graphic artist, designer and inventor.
From 1890 to 1893, he studied basic painting with Johann Caspar Herterich and "en plein aire" techniques with Paul Hoecker at the Academy of Fine Arts, Munich.
In 1913, at the suggestion of Ferdinand Hodler, he founded the St.Gallen branch of the GSMBA (Gesellschaft Schweizerischer Maler und Bildhauer [de]).
He was elected President of the GSMBA Executive Board in 1928, but quit in 1931 over issues related to politics.
For many years, he had suffered from bone tuberculosis and, by 1940, his health had deteriorated to the point that work was nearly impossible.