| Province: | QC |
| Type: | QC |
| Route: | 173 |
| Maint: | Transports Québec |
| Map: | Route 173-QC.png |
| Length Km: | 142.4 |
| Length Round: | 1 |
| Direction A: | South |
| Direction B: | North |
| Terminus A: | at Sandy Bay Township, Maine, US |
| Terminus B: | in Lévis |
| Junction: | in Saint-Georges in Beauceville in Vallée-Jonction in Scott in Lévis |
| History: | |
| Cities: | Lévis, Saint-Georges, Sainte-Marie, Vallée-Jonction, Beauceville |
| Previous Type: | QC |
| Previous Route: | 172 |
| Next Type: | QC |
| Next Route: | 175 |
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 (U.S. Route 201 / Maine SR 6), 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.