Abraham Louis Girardet (27 May 1772, Le Locle - 31 October 1821, Les Planchettes) was a Swiss etcher, engraver and miniaturist.
He was born to Samuel Girardet (1730–1807), a bookseller and publisher, and his wife Marie-Anne, née Bourquin. His siblings, Abraham, Charles Samuel, Alexandre and Julie (1769-1817), also became engravers.
He studied painting and graphic design together with his brothers. His works were signed as "Ab-Ls G." or "A.L.G.", to distinguish him from the elder Abraham. He travelled extensively; to France, the Netherlands, and Germany.
From 1789, in addition to the usual scenic views, he created numerous portraits of members of the National Assembly, and satirical illustrations. He also created miniature portraits, as well as hand stamps, for sealing, and engraved tableware.
In 1804, he developed the first symptoms of mental illness. His last years were spent in an institution.