| Official Name: | Alsószentmárton |
| Settlement Type: | Village |
| Coordinates: | 45.7833°N 36°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Hungary |
| Subdivision Type1: | County |
| Subdivision Name1: | Baranya |
| Unit Pref: | Imperial |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Alsószentmárton is a village in Baranya county, Hungary. It is located near the border with Croatia.
The population is composed of the Romani people.