| Medio San Juan | |
| Settlement Type: | Municipality and town |
| Mapsize: | 250px |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Colombia |
| Subdivision Type: | Country |
| Subdivision Name: |  Colombia |
| Subdivision Type1: | Department |
| Subdivision Name1: | Chocó Department |
| Area Total Km2: | 620 |
| Population As Of: | Census 2018[1] |
| Population Total: | 9073 |
| Population Density Km2: | auto |
| Timezone: | Colombia Standard Time |
| Utc Offset: | -5 |
Medio San Juan is a municipality and town in the Chocó Department, Colombia.