Cugnon (French pronunciation: [kyɲɔ̃]) is a village of Wallonia and a district of the municipality of Bertrix, located in the province of Luxembourg, Belgium.

Cugnon merged under the French regime with Auby-sur-Semois [fr], Géripont and Mortehan.

It was separated from Auby-sur-Semois on 30 July 1899 and in 1964 annexed the hamlet of Thibauroche, detached from Muno.

the Breton king Cogidunus cited by Tacitus in Agricola, or the Gallic Conconnetodunnus, cited by L. Roger; this name contains the Gallic duno “pregnant” and the Celtic adjective connios “clever, end”).

This Belgian Luxembourg location article is a stub.