| Official Name: | Barabai |
| Settlement Type: | Town |
| Pushpin Map: | Indonesia Kalimantan |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Kalimantan |
| Subdivision Type3: | Villages |
| Subdivision Name3: | 18 |
| Area Total Km2: | 40.71 |
| Population As Of: | mid 2023 estimate |
| Population Note: | [1] |
| Population Total: | 55687 |
| Population Density Km2: | auto |
| Timezone: | WITA |
| Utc Offset: | +8 |
| Coordinates: | -2.5833°N 138°W |
| Area Code: | +62 517 |
Barabai is the capital city of Hulu Sungai Tengah Regency, South Kalimantan, Indonesia. It is located 165 km away from Banjarmasin, the capital of the province. The town is at the feet of the Meratus Mountains that runs in a north–south arc on the island of Borneo.
Barabai has a tropical savanna climate (Aw) with moderate rainfall in August and September and heavy rainfall in the remaining months.