Heman Allen (February 23, 1779 – April 7, 1852) was an American lawyer, politician and ambassador from Colchester, Vermont.

[4] While in the State House he received the appointment of quartermaster of militia, with the rank of Brigadier general.

[5] He was elected as a Democratic-Republican candidate to the Fifteenth Congress, serving from March 4, 1817, until his resignation on April 20, 1818.

He was appointed by President James Monroe as America's first United States Minister Plenipotentiary to the new republic of Chile beginning on January 27, 1823.

[11] He served as president of the Burlington branch of the United States Bank from 1830 until the expiration of its charter in 1836.

When Allen was making arrangements for passage to Chile, he met Elizabeth Hart, the sister-in-law of Isaac Hull.