| Official Name: | Arenas de San Pedro |
| Type: | municipality |
| Pushpin Map: | Spain Castile and León#Spain |
| Pushpin Map Caption: | Location in Spain. |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Arenas de San Pedro |
| Area Total Km2: | 194.85 |
| Elevation M: | 510 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Arenas de San Pedro is a municipality located in the province of Ávila, Castile and León, Spain. According to the 2006 census (INE), the municipality has a population of 6,682 inhabitants. Its seal depicts a large castle located in the town. The seal says "Siempre incendiada y siempre fiel", meaning "always on fire and always faithful" . This is because the town has been burned down and pillaged many times in its history.