| Province: | QC |
| Type: | QC |
| Route: | 233 |
| Maint: | Transports Québec |
| Map: | Route 233-QC.png |
| Length Km: | 34.2 |
| Length Round: | 1 |
| Length Ref: | [1] |
| Direction B: | North |
| Direction A: | South |
| Terminus B: | in Saint-Hyacinthe |
| Terminus A: | in Farnham |
| Previous Type: | QC |
| Previous Route: | 232 |
| Next Type: | QC |
| Next Route: | 234 |
| Junction: | in Saint-Césaire in Sainte-Brigide d'Iberville |
Route 233 is a provincial highway located in the Estrie and Montérégie regions of Quebec east of Montreal. The highway links Farnham and Saint-Césaire with Saint-Hyacinthe. It starts at a junction with Route 104 between Farnham and Sainte-Brigide-d'Iberville, next to a training facility of the Canadian Forces and runs north toward a parclo interchange with Autoroute 10 after which it crosses the Rivière du Sud-Ouest which it follows for a few kilometers until its headwaters on Yamaska River. Shortly after it runs through Saint-Césaire, crossing Route 112, before continuing to follow the Yamaska until its end at the junction of Route 231.