 Auriac-Lagast is located some 27 km south of Rodez and 35 km north by north-east of Carmaux.Access to the commune is by the D522 road from Cassagnes-Bégonhès in the north-west which passes through the heart of the commune and the village and continues south-east to Durenque.The D25 passes inside the eastern border of the commune as it goes from Salmiech to Villefranche-de-Panat.