Dunham Jackson (July 24, 1888 in Bridgewater, Massachusetts – November 6, 1946) was a mathematician who worked within approximation theory, notably with trigonometrical and orthogonal polynomials.

[2] His book Fourier Series and Orthogonal Polynomials (dated 1941) was reprinted in 2004.

After attending the local school in Bridgewater, Jackson went up to Harvard in 1904 at the age of 16 to study mathematics, graduating A.B in 1908 and A.M. in 1909.

During the First World War he became an officer in the Ordnance Department where he produced a booklet of range tables for the artillery.

[3] While at Minnesota he won the Chauvenet Prize from the Mathematical Association of America in 1935 and was inducted as a Fellow of the American Physical Society in 1936.