| Bareyo | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Cantabria#Spain |
| Pushpin Map Caption: | Location within Cantabria |
| Subdivision Type: | Country |
| Subdivision Type1: | Autonomous community |
| Subdivision Type2: | Province |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Trasmiera |
| Subdivision Type4: | Judicial district |
| Seat Type: | Capital |
| Coordinates: | 43.4822°N -3.6108°W |
| Elevation M: | 46 |
| Area Total Km2: | 32.44 |
| Population Density Km2: | auto |
| Blank Name Sec1: | Official language(s) |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
| Leader Title: | Alcalde |
| Leader Name: | José de la Hoz Lainz (2015) |
| Leader Party: | PRC |
Bareyo is a municipality located in the autonomous community of Cantabria, Spain. According to the 2007 census, the city has a population of 1.702 inhabitants. Its capital is Ajo.