← 1637 1636 1635 1638 in Belgium → 1639 1640 1641
Decades:	1630s 1650s
See also:	Other events of 1638 List of years in Belgium

Events in the year 1638 in the Spanish Netherlands and Prince-bishopric of Liège (predecessor states of modern Belgium).

Monarch – Philip IV, King of Spain and Duke of Brabant, of Luxembourg, etc.

Governor General – Cardinal-Infante Ferdinand of Austria

Prince-Bishop – Ferdinand of Bavaria

• 23 January – Exports of grain prohibited.^[1]
• 24 May – French forces invest St Omer
• 20 June – Battle of Kallo
• 16 July – Siege of Saint-Omer lifted
• 26 August – Dutch siege of Geldern lifted
• 16 September – Jesuit College in Brussels stages Conversio S. Augustini^[2]

• Relation de tout ce qui s'est passé au siège et prise de Breme (Antwerp, Plantin Press)^[3]
• Honorius Vanden Born (pen name of Erycius Puteanus), Sedigh leven, daghelycks broodt (Leuven, Everaert De Witte)^[4]
• Jean-Jacques Courvoisier, L'Austriche saincte, ou l'Idée du vrai prélat, tirée de la vie parfaite et innocente de S. Maximilian, apôtre et patron de l'Autriche (Brussels, G. Schoevaerts)^[5]

• Peter Paul Rubens, Het Pelsken, now in the Kunsthistorisches Museum in Vienna
• Anthony van Dyck, Triple Portrait of Henrietta Maria, now in the Royal Collection (2 parts) and the Memphis Brooks Museum of Art (1 part)

• Date uncertain
  • Arnold de Jode, engraver
  • David Teniers III, painter
• 6 February – Philips Erard van der Noot, bishop (died 1730)
• 3 June – Jean-Guillaume Carlier, painter (died 1675)

• Date uncertain
  • Pieter Brueghel the Younger (born 1564), painter
  • Andreas de Nole (born 1598), sculptor
  • Jan Roos (born 1591), painter
• 10 March – Cornelis van der Geest (born 1575), merchant
• 30 April – Guillaume de Steenhuys (born 1558), magistrate
• 6 May – Cornelius Jansen (born 1585), theologian
• 22 May – Hendrik van den Bergh (born 1573), nobleman
• 5 August – Peter Minuit (born 1580/85), governor of New Netherland
• 1 October – Jan Snellinck (born c. 1548), painter