Bertrix (French pronunciation: [bɛʁtʁi]; Walloon: Bietris) is a municipality of Wallonia located in the province of Luxembourg, Belgium.

Bertrix is home to the NATO reserve Jehonville Air Base.

The municipality consists of the following districts: Auby-sur-Semois, Bertrix, Cugnon, Jehonville, and Orgeo.

Other population centers include: Bertrix railway station, in the east of the town, has regular train services to Libramont, Dinant and Virton.

On week-days trains run via Virton and Aubange to Arlon.