Florimond Van Duyse (4 August 1843 – 18 May 1910) was a Belgian lawyer, composer and musicologist.

At the same time he studied music, with Karel Miry at the Ghent Conservatory, winning First Prize in Harmony (1859) and Counterpoint (1862).

In 1869 he became a counsel at the Court of Appeals in Ghent, and from 1876 on he was a prosecutor at the Military Court for Antwerp, Mons and Ghent.

Here he fought for the use of the Dutch language in court proceedings, and finally made the first plea in Dutch at the Military Court in 1888.

He collected Dutch, Flemish and Walloon folk songs and published several volumes of them: Van Duyse died at Ghent in 1910.