| Province: | QC |
| Type: | QC |
| Route: | 204 |
| Maint: | Transports Québec |
| Map: | Route 204-QC.png |
| Length Km: | 263.9 |
| Length Round: | 1 |
| Length Ref: | [1] |
| Direction A: | West |
| Direction B: | East |
| Terminus A: | in Lac-Mégantic |
| Terminus B: | in Saint-Jean-Port-Joli |
| Previous Type: | QC |
| Previous Route: | 203 |
| Next Type: | QC |
| Next Route: | 205 |
| Counties: | Le Granit / Beauce-Sartigan / Les Etchemins / Montmagny / L'Islet |
| Junction: | in Saint-Gédéon-de-Beauce in Saint-Georges in Saint-Georges in Saint-Prosper in Sainte-Rose-de-Watford in Saint-Camille-de-Lellis in Saint-Fabien-de-Panet in Sainte-Lucie-de-Beauregard in Saint-Aldabert in Sainte-Perpetue in Saint-Jean-Port-Joli |
Route 204 is a finite two-lane east–west highway on the south shore of the Saint Lawrence River in Quebec. It is one of the longest secondary highways in the province. Its eastern terminus is in Saint-Jean-Port-Joli at the junction of Route 132 and the western terminus is in Lac-Mégantic at the junction of Route 161. Although it is numbered as an east–west highway, the road follows a north–south course from Saint-Jean-Port-Joli to Saint-Pamphile, where it then follows a mostly southwest–northeast course until Saint-Georges, where after crossing the Chaudière River, follows it in a north–south course until the source of the Chaudiere in Megantic Lake, in Lac-Mégantic.
| RCM or ET | Municipality | Km | Junction | Notes | |||
|---|---|---|---|---|---|---|---|
| Le Granit | Lac-Mégantic | 0.0 | 161 SOUTH: to Frontenac 161 NORTH: to Nantes | ||||
| Audet | 21.1 | Chemin-du-Lac-Drolet | NORTH: to Lac-Drolet | ||||
| Saint-Ludger | 39.1 | 9e Rang | SOUTH: to Saint-Robert-Bellarmin | ||||
| Beauce-Sartigan | Saint-Gédéon-de-Beauce | 48.8 | (Overlap 8.9 km) | 269 SOUTH: to Saint-Théophile | |||
| Saint-Martin | 57.7 | (Overlap 8.9 km) | 269 NORTH: to Saint-Honoré-de-Shenley | ||||
| Saint-Georges | 74.0 | (Overlap 4.4 km) | 173 SOUTH: to Saint-Côme–Linière | ||||
| 77.2 | (South end) | 271 NORTH: to Saint-Benoît-Labre | |||||
| 78.4 | (Overlap 4.4 km) | 173 NORTH: to Notre-Dame-des-Pins | |||||
| (South end) | 73 NORTH: to Notre-Dame-des-Pins | ||||||
| Les Etchemins | Saint-Prosper | 96.9 | 275 SOUTH: to Sainte-Aurélie 275 NORTH: to Saint-Benjamin | ||||
| Sainte-Rose-de-Watford | 112.3 117.4 | 277 SOUTH: to Saint-Louis-de-Gonzague 277 NORTH: to Lac-Etchemin | |||||
| Sainte-Justine | 125.3 | Route des Eglises | SOUTH: to Saint-Cyprien | ||||
| Saint-Camille-de-Lellis | 141.9 | (South end) | 281 NORTH: to Saint-Magloire | ||||
| Montmagny | Saint-Just-de-Bretinieres | 155.2 | 283 SOUTH: to Lac-Frontière | ||||
| Saint-Fabien-de-Panet | 159.3 | 283 NORTH: to Saint-Paul-de-Montminy | |||||
| Sainte-Lucie-de-Beauregard | 169.3 | (South end) | 283 NORTH: to Lac-Frontière | ||||
| L'Islet | Saint-Adalbert | 189.7 | (South end) | 285 NORTH: to Saint-Marcel | |||
| Sainte-Perpetue | 221.7 | (East end) | 216 WEST: to Sainte-Félicité | ||||
| Saint-Jean-Port-Joli | 260.7 261.2 | 20 EAST: to Saint-Roch-des-Aulnaies 20 WEST: to L'Islet | |||||
| 263.9 | 132 WEST: to L'Islet 132 EAST: to Saint-Roch-des-Aulnaies | ||||||