Louis VI of Hesse-Darmstadt (German: Ludwig) (25 January 1630 – 24 April 1678) was Landgrave of Hesse-Darmstadt from 1661 to 1678.

[1] He was the eldest of three sons of the Landgrave George II of Hesse-Darmstadt and Sophia Eleonore of Saxony.

On 24 November 1650 he married his first cousin Maria Elisabeth of Schleswig-Holstein-Gottorp (1634–1665), daughter of his maternal uncle Frederick III, Duke of Holstein-Gottorp.

On 5 December 1666 he married Elisabeth Dorothea of Saxe-Gotha-Altenburg (1640–1709), daughter of Ernest I, Duke of Saxe-Gotha.

This article about a member of the German nobility is a stub.