Émiland Marie Gauthey ((1732-12-03)3 December 1732 in Chalon-sur-Saône – (1806-07-14)14 July 1806 in Paris) was a French mathematician, civil engineer and architect.
As an engineer for the États de Bourgogne (English: States of Burgundy), he was the creator of a great deal of the region's civil infrastructure, such as the Canal du Centre between Digoin and Chalon-sur-Saône (1784–1793), bridges including those at Navilly (1782–1790) and Gueugnon (1784–1787), and buildings such as the Eglise Saint-Pierre-et-Saint-Paul ("Church of St Peter and St Paul") at Givry (Saône-et-Loire) (1772 – 1791) and the theatre at Chalon-sur-Saône.
Gauthey became Chief Engineer of the États de Bourgogne in 1782, on the death of his predecessor and close collaborator, Thomas Dumorey.
After the French Revolution, he held several important posts in the Haute administration des Ponts-et Chaussées ("High Commission for Bridges and [High]ways") in Paris.
He was awarded the Légion d'honneur in 1804 on its creation by Napoleon Bonaparte.
From 1805 until his death, he was the highest-ranked engineer in France.