Bordeaux Montaigne University (French: Université Bordeaux Montaigne, pronounced [ynivɛʁsite bɔʁdo mɔ̃tɛɲ] ^ⓘ; formerly Université Michel de Montaigne Bordeaux 3) is a public university in Pessac, France, approximately 8 kilometres (5 miles) southwest of the city centre of Bordeaux.

It forms part of the ComUE d'Aquitaine university group.

Bordeaux Montaigne University was established in 1970 after a restructuring of public universities in and near the city of Bordeaux. The university was known as Université de Bordeaux 3 during its first two decades. In 1990, it took on the name of philosopher Michel de Montaigne who was a native of the modern-day Nouvelle-Aquitaine region, becoming Université Michel de Montaigne Bordeaux 3. In 2014, the university's name was simplified to Université Bordeaux Montaigne after the universities of Bordeaux 1, 2, and 4 were all merged to become the University of Bordeaux. Bordeaux Montaigne University celebrated its 50th anniversary in 2020.

The university provides bachelors, vocational bachelors, masters, and doctoral degrees in the arts, linguistics, management and humanities, abiding by the European Bologna process, and thus complying with the European Credit Transfer System. The university conducts substantial research in all of these disciplines.

Bordeaux Montaigne University also offers certificates such as DAEU and DUT.

A double-degree (for example in Law and Languages) is possible with the Montesquieu University or other Bordeaux Higher Education Institutes.

Evening classes in additional languages or in rarer languages (cantonese, etc.) are also available.

The Doctoral College Montaigne-Humanités (literally: "Montaigne Humanities" is the largest doctoral college on the Bordeaux Universities campus and one of the largest in France. It is also referred to as Ecole doctorale "unique" (literally: Sole Doctoral College), as it is an conglomerate of several research fields and other doctoral colleges in humanities, which were once apart.