Elisabeth of Luxembourg (Visegrád, Hungary, 7 October 1409 – Győr, Hungary, 19 December 1442) is a queen consort of Hungary, Bohemia and Duchess consort of Austria.

She is the interim regent of Hungary in 1439–1440, and a throne claimant and one of the participants in the Hungarian civil war 1440–1442.

She is the only child of Sigismund, Holy Roman Emperor, king of Hungary and Bohemia, by his second wife, Barbara of Celje.

Her father was the last male descent of the House of Luxembourg on the Imperial Throne.