This village, perched in 755 m of height in the center of a circus of mountains in Diois, dominates the Valley of Roanne. The mountain of Aucelon peaks in 1356 m of height. His inhabitants are conscripts les Aucelonnais and the Aucelonnaises. The municipality extends over 26,3 km ². Surrounded by the municipalities of Pennes-le-Sec, Pradelle and Barnave, Aucelon is situated in 48 km in the Northeast of Montélimar most big city of neighborhood.