Quincieux (French pronunciation: [kɛ̃sjø]; Arpitan: Quinciô) is the northernmost commune of the Metropolis of Lyon in the Auvergne-Rhône-Alpes region, central-eastern France.

It is located on the right bank of the Saône, north-northwest of Lyon, on the border with both Rhône and Ain, the latter of which follows the course of the Saône.

In 2020, it had a population of 3,502.

Quincieux is served by Quincieux station on the Paris–Marseille railway.