| Official Name: | Luka |
| Native Name: | Лука |
| Settlement Type: | Village |
| Pushpin Map: | Bosnia and Herzegovina |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Bosnia and Herzegovina |
| Subdivision Type1: | Entity |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Gacko |
| Unit Pref: | Imperial |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
Luka (Serbian: Лука) is a village in the municipality of Gacko, Republika Srpska, Bosnia and Herzegovina.[1]