Jacob Viner (; May 3, 1892 – September 12, 1970) was a Canadian economist and is considered with Frank Knight and Henry Simons to be one of the "inspiring" mentors of the early Chicago School of Economics in the 1930s: he was one of the leading figures of the Chicago faculty.
Paul Samuelson named Viner (along with Harry Gunnison Brown, Allyn Abbott Young, Henry Ludwell Moore, Frank Knight, Wesley Clair Mitchell, and Henry Schultz) as one of the several "American saints in economics" born after 1860.