Electricity Trust of South Australia
| Industry | Electricity generation, distribution and retailing |
|---|---|
| Predecessor | Adelaide Electric Supply Company |
| Founded | 1946 |
| Founder | Government of South Australia |
| Defunct | 1999 |
| Fate | Disaggregated and privatised |
| Successors | |
Area served | South Australia |
| Owner | Government of South Australia |
The Electricity Trust of South Australia (ETSA) was the South Australian Government-owned monopoly vertically integrated electricity provider from 1946 until its privatisation in 1999.