Bar-sur-Seine (French pronunciation: [baʁ syʁ sɛn], literally Bar on Seine) is a commune in the Aube department in the Grand Est region of north-central France.

Access to the commune is by the D671 road from Virey-sous-Bar in the north-west which passes through the town and continues south-east to Celles-sur-Ource.

There is also the railway passing through the commune from Saint-Parres-lès-Vaudes in the north-east and continuing to the next station at Polisot in the south-east.

[11] The castellany (French: châtellenie) of Bar-sur-Seine was part of the domains of the Valois dukes of Burgundy from 1435[5] until it was seized by Louis XI in 1477 following the death of Charles the Bold.

Bar-sur-Seine appears as Bar ſur Seine, with a long s, on the 1750 Cassini Map[13] and the same on the 1790 version.

This area of Aube Champagnes includes other neighbouring communes such as Les Riceys and Bar-sur-Aube.