Isaac David Broydé (23 February 1867, Grodno Governorate, Russian Empire – 15 April[1] 1922, New York City) was an Orientalist and librarian.
He was born in Porozowo, in the Grodno Governorate of the Russian Empire (present-day Belarus).
From 1890 to 1895 he was secretary to Joseph Derenbourg, and on the death of the latter, in 1895, was appointed by the publication committee of the Alliance Israélite Universelle one of the collaborators to continue the publication of Saadia's works, which Derenbourg had commenced.
In 1895 Broydé was appointed librarian to the Alliance Israélite Universelle, which position he resigned in 1900.
He then went to London, and during his short stay there catalogued the library of Elkan Nathan Adler.