| Official Name: | San Juan y Martínez |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Cuba |
| Subdivision Type1: | Province |
| Subdivision Name1: | Pinar del Río |
| Area Total Km2: | 409 |
| Population As Of: | 2022 |
| Population Total: | 42,109 |
| Population Rural: | 25,607 |
| Population Urban: | 16,502 |
| Population Density Km2: | auto |
| Timezone: | EST |
| Utc Offset: | -5 |
| Coordinates: | 22.2667°N -133°W |
| Elevation M: | 20 |
| Area Code: | +53-82 |
San Juan y Martínez (pronounced as /es/) is a municipality and town in the Pinar del Río Province of Cuba.
Its economy is centered mainly on agriculture and the crop of its farmers, the largest of which being tobacco. In Cuba, San Juan y Martinez is known as the "Mecca of the Tobacco."
San Juan has its own hospital with a fully functional maternity ward as well as a "Polyclinic" treatment center, both open 24 hours.
In 2022, the municipality of San Juan y Martínez had a population of 42,109.[1] With a total area of 409km2,[2] it has a population density of 100/km2.