Wilhelm August Graah (1793–1863) was a Danish naval officer and Arctic explorer.

Graah had mapped areas of West Greenland when he, in 1828–30, was sent by King Frederick VI of Denmark on an expedition to the unmapped eastern coast with the purpose to search for the lost Eastern Norse Settlement.

[2] Two naturalists participated - the geologist Christian Pingel and the botanist Jens Vahl.

Although he had been asked to reach 69°, Graah fell short of his goal of going further north owing to innumerable hardships.

He made numerous contacts with the now extinct Southeast-Greenland Inuit, describing in detail some of their customs and way of life.