False. The Tropic of Capricorn (23°26′S) does not pass through South Australia.
The Tropic of Capricorn traverses the northern portions of three states/territories:
South Australia lies entirely south of the Tropic of Capricorn. Its northern border is the 26th parallel south—roughly 300 km (185 mi) south of the Tropic. The entire state is in the temperate zone, not the tropics.
| Location | Latitude | Relation to Tropic (23.43°S) |
|---|---|---|
| Adelaide (SA capital) | 34.9°S | ~1,300 km south |
| Port Augusta (SA north) | 32.5°S | ~1,000 km south |
| Alice Springs (NT) | 23.7°S | ~30 km south |
| Longreach (QLD) | 23.4°S | On the Tropic |
Verdict: The statement is false. South Australia is entirely outside the tropics.