Jonas Collett (25 March 1772 – 3 January 1851) was a Danish-Norwegian public official, legislator, and statesman.

He replaced Herman Wedel Jarlsberg as acting County Governor of Buskerud in 1813 and was succeeded by his brother Johan Collett in 1814.

Together with Niels Aall, he led the negotiations with Swedish general Magnus Björnstjerna which resulted in the Convention of Moss.

His position made him the most prominent minister, although with political power than that of the Governor of Norway.

When governor Baltzar von Platen died in 1829, no new governor was appointed, and Collett subsequently became the highest authority in Norway until he left office in 1836, except for a brief period in 1833 when Crown Prince Oscar was appointed viceroy.