The Place Fontainas (French) or Fontainasplein (Dutch) is a square in central Brussels, Belgium.

The Place Fontainas was laid out following the covering of the river Senne (1867–1871), as part of the major urban works by the architect Léon Suys under the tenure of the then-mayor of the City of Brussels, Jules Anspach.

[3] In his 1865 project, Suys planned to erect a monumental fountain on the square, which was to break the boulevards' uniformity, but it was abandoned for budgetary reasons.

[1] Since 1871, the square has borne the name of the liberal politician and former mayor of the City of Brussels, André-Napoléon Fontainas.

Since 29 June 2015, it has been part of a large pedestrian zone in central Brussels (French: Le Piétonnier).