| Caió | |
| Settlement Type: | Sector |
| Coordinates: | 11.9278°N -16.2028°W |
| Subdivision Type: | Country |
| Subdivision Name: | Guinea-Bissau |
| Subdivision Type1: | Region |
| Subdivision Name1: | Cacheu |
| Unit Pref: | Metric |
| Population As Of: | 2009 |
| Population Total: | 12,696 |
| Population Density Km2: | auto |
| Timezone1: | GMT |
| Utc Offset1: | +0:00 |
Caió is a sector in the Cacheu Region of Guinea-Bissau. Its population is 12,696 (2009 census).[1] The island Pecixe is part of the sector.
Caió has a tropical savanna climate (Aw) with little to no rainfall from November to May and heavy to very heavy rainfall from June to October.