Carl Christopher Georg Andræ (14 October 1812 – 2 February 1893) was a Danish politician and mathematician.

Being an individualist he, after the defeat of the National Liberals, never formally joined any political group but remained for the rest of his life a sceptical de facto conservative spectator of the 'Constitutional Struggle'.

His parents were captain at the Third Jutland Infantry Regiment Johann Georg Andræ (1775–1814) Nicoline Christine Holm (1789–1862).

He followed a course in mathematics under Hans Christian Ørsted at the College of Applied Sciences before enrolling at the new Militære Højskole[clarification needed] in 1830.

[2] This was two years before Thomas Hare published his first description of an STV system, without reference to Andræ.