Route 173 (Route-du-Président-Kennedy) is a major north/south highway on the south shore of the St. Lawrence River in Quebec, Canada, named after the assassinated American president, John F. Kennedy. Its southern terminus is at the Armstrong–Jackman Border Crossing in Saint-Théophile in the hamlet of Armstrong, at the border with Maine, and its northern terminus is in Lévis at the junction of Route 132. Route 173 follows the Chaudière River for most of its course, from Saint-Georges, down to Scott, where the route takes a more northeastern route towards Lévis, crossing the Etchemin River in the municipality of Saint-Henri-de-Lévis.

Saint-Théophile is a municipality in the Municipalité régionale de comté de Beauce-Sartigan in Quebec, Canada on the Canada–United States border. It is part of the Chaudière-Appalaches region and the population is 702 as of 2021. It is named after reverend Théophile Montminy, who had been chosen by the archdiocese to find a proper location for a church.