The Sovereign Congress (French: Souverain Congrès; Dutch: Soevereine Congres), was the legislative assembly created on 11 January 1790 by the Treaty of Union which established the United Belgian States. Its primary task was to manage the sovereignty of the independent territories of the United States of Belgium during the Brabant Revolution.

• François de Nélis, Bishop of Antwerp (11 January 1790 – 8 November 1790)
• Hendrik van Crumpipen (8 November 1790 – 2 December 1790)

• National Congress of Belgium

• Rulers of Belgium
• Text of the Treaty of Union (in French)
• Text of the Treaty of Union (in Dutch)