Edward Sang FRSE FRSSA LLD (30 January 1805 – 23 December 1890) was a Scottish mathematician and civil engineer, best known for having computed large tables of logarithms, with the help of two of his daughters.

In the 1830s he is listed as a teacher of mathematics living at 32 St Andrew Square in Edinburgh.

Sang died at his home, 31 Mayfield Road, Edinburgh Newington on 23 December 1890.

The inscription on the tombplate is (Elmslie, Nicol, Millar, Wilkie and Chalmers are middle names taken from ancestors' surnames.)

In 1836, Sang explained how a spinning top could be used to demonstrate the rotation of the Earth, anticipating Foucault's pendulum.

(see Johann G. Hagen: La rotation de la terre, ses preuves mécaniques anciennes et nouvelles, 1911) Sang worked for many years on trigonometric and logarithmic tables.

Sang also had a younger brother John (1809–1887), who was civil engineer and invented a planimeter: