| Official Name: | Bast |
| Pushpin Map: | Croatia Split-Dalmatia County#Croatia |
| Pushpin Map Caption: | Location in Croatia |
| Coordinates: | 43.355°N 16.985°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Croatia |
| Subdivision Type1: | County |
| Subdivision Name1: | Split-Dalmatia County |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.8 |
| Elevation M: | 310 |
| Population As Of: | 2021 |
| Population Total: | 134 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
Bast is a village in the Baška Voda municipality in southern Croatia, located at the southern end of the Sveti Ilija tunnel. In 2011 it had a population of 126.[2] The village has declined in population since the 1950s, where it peaked at around 450 inhabitants. The traditional livelihood of the village was agriculture and the local quarry but since the turn of the 21st century there has been a shift to tourism, with the renting out of apartments and rooms driving the local economy.