(22 November 1787, Brændekilde on the Danish island of Funen - 14 November 1832, Copenhagen) was a Danish scholar and philologist.
Rask studied at the University of Copenhagen and at once showed remarkable talent for the acquisition of languages. In 1808 he was appointed assistant keeper of the university library and some years afterwards professor of literary history. In 1811 he published in Danish his Introduction to the Grammar of the Icelandic and other Ancient Northern Languages from printed and manuscript materials accumulated by his predecessors in the same field of research.