Josep de Margarit i de Biure (1602, Castelló d'Empúries–1685, Perpignan) was a leader of the Catalan forces in the Reapers' War.
He led the Catalan attack on ConstantĂ, and took part in the Siege of Lleida and the Battle of MontmelĂł.
In 1641, Louis XIII of France made him Governor of Catalonia.
In later life, Louis XIV of France made him Lord of Thuir.