Balzac is located some 7 km north-west of
Angoulême. Access to the commune is by the D737 from Angoulême which passes through the east of the commune and the town continuing north to
Montignac-Charente. The D105 branches off the D737 north of the town and goes east to
Champniers. The D406 also branches off the D737 and goes west to
Vindelle. Apart from the town there are the hamlets of Coursac, La Chapelle, Les Chabots, and Les Courlis in the commune. The commune is mostly farmland with a small forest in the south-west and a significant urban area for the town.
Geology and terrain Balzac occupies the interior of a wide bend of the
Charente. The bedrock of the large eastern half of the commune, which is the highest in altitude, consists of
limestone dating from the
Upper Jurassic (
Kimmeridgian) period. The centre of the town, between Labbés, Genin, and Texier, is located on old alluvium from the
Quaternary period. The western part of the commune, between La Chapelle and Chabots, contains other alluvial deposits which form a low
terrace. The river bed (floodplain) is itself made up of more recent alluvium (
silt, sandy clay, and
peat). The terrain that separates the valley of the Charente from that of the
Argence forms a kind of long cliff, very high and steep in its northern part, which is the concave side of the bend in the river near the villages of Coursac and Font-Saint-Martin, which gradually decreases in height to end at the foot of the Chateau of Balzac. The highest point in the commune is at an altitude of 102 m east at Puylebin to the east of Coursac. The lowest point is 30 m on the Charente river at the confluence of the Argence. The village is about 60 m above sea level.
Hydrography The river
Charente forms the entire south, west, and north-west border of the commune as it flows around the commune and continues south-east to eventually join the
Atlantic Ocean at
Rochefort. The
Argence flows from the north-east and forms much of the eastern border where it joins the Charente in the south-eastern corner of the commune.
Climate The climate is oceanic Aquitaine and similar to the town of Cognac where the departmental weather station is located.
Neighbouring communes and villages ==Toponymy==