Mathias Collett (10 September 1708 – 24 March 1759) was a Norwegian civil servant.
Collett was born in Christiania (now Oslo), Norway. He was the son of merchant and city captain James Collett (1687-1724) and Karen Berg (1687-1744). He was the grandson of English-born, Norwegian merchant James Collett (1655–1727).[1]
He served as County Governor of Finmarkens amt (now Finnmark) from 1750 to 1757, and County Governor of Christians Amt (now Oppland) from 1757 to 1759.[2]