Barbazan is a Spa town in the Comminges region located some 13 km south-west of Saint-Gaudens and 12 km north of Cierp-Gaud. The western border of the commune is also the departmental border between Haute-Garonne and Hautes-Pyrénées. Access to the commune is by Route nationale N125 which comes from the end of the A645 autoroute and passes down the western side of the commune south to Ore. The D26E road comes from Labroquère in the north-west and passes through the north of the commune ending in the village. The D26 comes from Valcabrère in the west and passes through the village continuing to Sauveterre-de-Comminges in the east. The D33D and the D33L go south from the village to join the N125. The commune has extensive forests in the east with some farmland in the west.[3]
The Garonne river forms most of the western border of the commune as it flows north, passing through Toulouse, to eventually join the Dordogne to form the Gironde estuary at Bordeaux. Lake Barbazan, north-west of the village at 452 m above sea level, is of glacial origin. It is surrounded by moraine deposits: sub-glacial moraine from Cumania and rocky outcrops of moraine west of the Lake. The Ruisseau de Corp flows west from the lake to join the Garonne.[3]
Vert, 3 jets of water Argent issuant from a fountain with antique base of Or on a wave Argent mouvant from base; in chief parti per pale: at 1 Gules with 4 otelles Argent addorsed saltrirewise, at 2 Azure with a cross of Or.
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