Saint-Cyr-au-Mont-d'Or (; Arpitan: Sant-Ciro-en-Mont-Tor) or simply Saint-Cyr is a commune in the Metropolis of Lyon in the Auvergne-Rhône-Alpes region, central-eastern France. It is a northern suburb of Lyon, bordering its 9th arrondissement.
It is one of the richest communities in the Lyon Metropolis with a median household income of â¬89,819 per year.