Johann Diedrich Longé (5 December 1779; 10 May 1863, Stralsund, Mecklenburg, Germany) was a Swedish and Prussian naval officer.
In 1805 he was exempted from service in order to serve with English merchant and naval ships.
He was also involved in the formation of the first Prussian Naval Academy, the Navigationsschule, opened in Danzig in 1817.
On 17 August 1827 he became chairman Royal naval depot on Dänholm island at Stralsund.
In 1848 he became chairman of the Marine Committee in Stralsund, prompting the construction of the rowing gunboat Strela-Sund.