| San Lorenzo | |
| Settlement Type: | Town |
| Total Type: | Town |
| Pushpin Map: | Ecuador |
| Coordinates: | 1.2851°N -78.834°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Esmeraldas |
| Subdivision Type2: | Canton |
| Subdivision Name2: | San Lorenzo Canton |
| Area Total Km2: | 4.62 |
| Population Footnotes: | [1] |
| Population As Of: | 2022 census |
| Population Total: | 28491 |
| Population Density Km2: | auto |
San Lorenzo is a port town on the north coast of Ecuador, about 18 km south of the Colombian border. It was joined by a narrow gauge rail to the city of Ibarra in the Highlands and for many years it was an important port for the export of balsa wood and tagua.
As of 2022 San Lorenzo had a population of 28,491.