Amagne is a French commune in the Ardennes department in the Champagne-Ardennes region of northern France.
The inhabitants of the commune are known as Aquamagniens or Aquamagniennes
Amagne is located some 40 km south-west of Charleville-Mézières and 40 km north-east of Rheims. It can be accessed by the D30 road running east from Rethel to the village then continuing east to Ecordal. Route D21 also comes from Novy-Chevrieres in the north-west and continues towards Attigny in the south-east. Route D45 also comes to the commune from Ambly-Fleury in the south-west. A railway from Rethel to Charleville-Mézières passes through the north-west of the commune and there is a branch line from Amagne-Lucquy through the village and continuing east to the next station at Alland'Huy-et-Sausseuil but there is no station in the commune. The station at Amagne-Lucquey just outside the commune in the west off the D21 road serves the commune.
The Aisne river forms the southern boundary of the commune. The Ruisseau de Saulces passes through the village and a number of streams flow into this stream. Apart from the village the commune is entirely farmland. There are no other hamlets in the commune.