Jublains (French pronunciation: [ʒyblɛ̃]) is a commune in the Mayenne department in north-western France.

Jublains, formerly spelled Jubleins, is the site of ancient Noeodunum (also spelled Noiodunum or Noviodunum), the capital of the ancient Gallic tribe of the Diablintes, later occupied and settled by Romans and called Civitas Diablintum.

There is no doubt that the old Gallic name of the town was exchanged for that of the people, Diablintes - wCivitas Diablintum.

In a medieval document, referred to by D'Anville, the town's name is written Jublent, and thence comes the corrupted name Jublains.

[citation needed] In an excavation in London a writing tablet was found with a note about a slave girl from Jublains.