Théodose Achille Louis Vicomte du Moncel or Théodore du Moncel was a prominent French physicist and advocate of the use of electricity. He invented many electrical devices and wrote several books. He was also a proficient artist, making high-quality prints of scientific and cultural interest.
He also worked as a popularizer of knowledge on electricity.
In 1879, he founded the journal La lumière électrique.
He is one of the founders of the Société Nationale des Sciences Naturelles et Mathématiques of Cherbourg and was a member of the French Academy of Sciences.
He was conseiller général of the Manche département.