| Official Name: | Zarzalejo |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Community of Madrid |
| Flag Size: | 140px |
| Leader Name: | Rafael Herranz Ventura |
| Established Title: | Founded |
| Area Land Km2: | 20.63 |
| Population Density Km2: | 62.2 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 40.5°N -7°W |
| Elevation M: | 1104 |
| Postal Code Type: | Postal code |
| Area Code: | 34 (Spain) + |
Zarzalejo (pronounced as /es/) is a village in the Community of Madrid in Sierra Oeste. It had 1,773 inhabitants in 2022.[1]
An ancient farmstead dating from Roman times was found here.[2] It was occupied in the second and third centuries AD.[3]