Assieu is located some 30 km south by south-east of
Givors and 8 km east by north-east of
Saint-Maurice-l'Exil. Access to the commune is by the D131 road from the D134 in the south passing north then east in the commune to the town then north and continuing north-west to
Route nationale 7. Apart from the town there is the village of La Charinaz in the east and Les Bruyeres in the west. The commune has large forests in the east as well as one in the west with significant residential areas and the rest of the land farmland. The Vareze river forms the northern border and gathers many tributaries rising in the commune as it flows west to join the
Rhône at
Saint-Alban-du-Rhône.
Neighbouring communes and villages Heraldry ==Administration==