Thomas Dumorey (1717 at Chalon-sur-Saône, Burgundy – 1782 at Dijon, Burgundy) was a French civil engineer and architect. He was the chief ingénieur des ponts et chaussées for the States of Burgundy (French: États de Bourgogne).
In 1706, the États de Bourgogne ("States of Burgundy") had decided to appoint a chief Ingénieur des ponts et chaussées (literally "Engineer of Bridges and [High]ways", more naturally in Modern English "Civil Engineer") for the province. The first was a Mr. Jerson, who was replaced in November 1710 by a Mr. Morin, an architect. He held the post until 1736, when the States replaced him with a Mr. Bonnichon. When Bonnichon fell ill, Dumorey was appointed as his assistant. Dumorey became the Chief Engineer himself in 1750.
In 1735, he drew up plans for the town hall at Chalon-sur-Saône, which was completed in 1742.
In 1752, the States of Burgundy decided to create two assistant chief posts. Dumorey became the chief engineer of Ponts et Chaussées. In March 1752, "commissioning" was given over to Joseph Pierre Antoine, an alumnus of the École des Ponts et Chaussées, and to Charles Joseph Le Jolivet, a student.
In 1758 a third assistant post was created and awarded to Émiland Marie Gauthey.
He was the architect of the Château d'Arcelot from 1761 to 1764.
In 1762 he worked on a plan for the provision of water to the public water fountains in Dijon, as a contractor for Dufour, the superintendent of Villeneuve-sous-Charigny.