Pont-d'Ain (French pronunciation: [pɔ̃ dɛ̃]; Arpitan: Pont d'En, also Lo Pont d'En; lit.

"Bridge of Ain") is a commune in the Ain department in the Auvergne-Rhône-Alpes region in Eastern France.

It is best known for its Château de Pont-d'Ain (Castle of Pont-d'Ain) on the right bank of the Ain River, a monument historique since 2004.

It was built in the 14th century, before it was refurbished and reorganised a number of times.

[3] Pont-d'Ain is served by Pont-d'Ain station on the Mâcon–Ambérieu railway, operated by the SNCF.