Wikimedia Commons has media related to Belgium in the 18th century.
- 18th century in the Southern Netherlands — the Holy Roman Empire fiefs remaining in the Low Countries, primarily within present day Belgium and Luxembourg.
- During the 18th century, the main fiefs were the Habsburg Spanish Netherlands (–1714) and Austrian Netherlands (1714–1794), after which the "Southern Netherlands" and adjacent territories were annexed by the French First Republic in 1794.