BAR-SUR-AUBE, an arrondissement of the department of the Aube, in France, comprehending 4 cantons and 88 communes. Area, 410 square miles. Pop. in 1851, 44,347. The chief place is the city of the same name, in a picturesque district, the wine of which is much esteemed. Pop. 4380. Long. 4. 44. E. Lat. 48. 13. N.