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 1810 he became Prefect of the Departments of the Vaucluse and in 1811 of the Estuaries of the Meuse.

After the outbreak of the Belgian revolution in Brussels in September 1830 he was among the delegates of the southern provinces, which were summoned to The Hague.

In this position he served seven parliamentary sessions as president of the parliament.