| O Sar | |
| Native Name Lang: | es |
| Settlement Type: | Comarca |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Galicia |
| Subdivision Type2: | Province |
| Subdivision Name2: | A Coruña |
| Seat Type: | Capital |
| Seat: | Padrón |
| Parts Type: | Municipalities |
| Parts Style: | list |
| P1: | Dodro, Padrón, Rois |
| Area Total Km2: | 177.4 |
| Population Total: | 17354 |
| Population As Of: | 2005 |
| Population Density Km2: | auto |
| Population Demonym: | Sareños |
| Blank Name Sec1: | Largest municipality |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Area Code Type: | Dialing code |
Sar is a comarca in the province of A Coruña, Galicia, western Spain. The overall population of this local region is 17,354 (2005).