Goswin Joseph Augustin, Baron de Stassart (2 September 1780 – 16 October 1854) was a Dutch-Belgian politician. Stassart studied accounting and economics in Paris. In 1804 he became Auditor in the French State Council, in 1805 he became Intendant in Tirol, and in 1807 he served in the French army in Prussia. In 1810 he became Prefect of the Departments of the Vaucluse and in 1811 of the Estuaries of the Meuse. After the second Austrian restoration he lived on his estate near Namur, until the city of Namur in 1822 sent him to the second chamber of parliament of the Netherlands, where he belonged to the opposition.