| Official Name: | Waikabubak |
| Pushpin Map: | Indonesia Sumba#Indonesia |
| Pushpin Map Caption: | Location in Indonesia |
| Pushpin Mapsize: | 300 |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Lesser Sunda Islands |
| Subdivision Type2: | Province |
| Subdivision Name2: | East Nusa Tenggara |
| Subdivision Type3: | Regency |
| Subdivision Name3: | West Sumba |
| Area Total Km2: | 44.71 |
| Population As Of: | mid 2022 estimate |
| Population Note: | [1] |
| Population Total: | 33821 |
| Timezone: | WITA / UTC |
| Utc Offset: | +8 |
| Coordinates: | -9.6358°N 119.4131°W |
Waikabubak is a town in East Nusa Tenggara province of Indonesia and it is the capital of West Sumba Regency. Waikabubak is the second largest town on Sumba island after Waingapu; it had a population of 33,064 at the 2020 Census,[2] and the official estimate as at mid 2022 was 33,821.[3]