Casimir Gide (4 July 1804 – 18 February 1868) was a 19th-century French composer, bookseller as well as prints and maps editor.

The son of the Parisian bookseller Theophile Etienne Gide (1768–1837), to whom he would succeed, and of a singer in the chapel of the king, he studied harmony and musical composition at the Conservatoire de Paris.

On 4 February 1833, he received the bookseller patent from the Maison Gide fils.

He was a major printer of lithographs and financed the publication of six volumes, among them nineteen of the Voyages pittoresques et romantiques dans l'ancienne France by Charles Nodier and Justin Taylor.

[1] In 1854, he was one of the first to launch the trend of salon operettas and artistic evenings.