| Official Name: | Mazarchevo |
| Native Name: | Мазарачево |
| Settlement Type: | Village |
| Pushpin Map: | Bulgaria |
| Pushpin Label Position: | Location in Bulgaria |
| Subdivision Name: |  Bulgaria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kyustendil Province |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Kyustendil |
| Population As Of: | 2011 |
| Population Total: | 66 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 42.35°N 22.6219°W |
Mazarchevo is a village in Kyustendil Municipality, Kyustendil Province, south-western Bulgaria.[1]
The village of Mazarchevo is losing many inhabitants due to emigration and a negative natural growth rate.
As of February 2011, there are no inhabitants aged under 30. However, there are 13 people aged 80 years or more. The village is quite old: the median age is about seventy years old.