The 79th parallel south is a circle of latitude that is 79 degrees south of the Earth's equatorial plane in the Antarctic.
The parallel passes only through Antarctica and Antarctic ice shelves.
Starting at the Prime Meridian and heading eastwards, the parallel 79° south passes through:
| Co-ordinates | Continent | Notes |
|---|---|---|
| Antarctica | Queen Maud Land, claimed by | |
| Western Australian Antarctic Territory, claimed by | ||
| Adélie Land, claimed by | ||
| Eastern Australian Antarctic Territory, claimed by | ||
| Ross Dependency, claimed by | ||
| Marie Byrd Land, Unclaimed territory | ||
| Antártica Chilena, claimed by | ||
| Territory claimed by and (overlapping claims) | ||
| Territory claimed by, and (overlapping claims) | ||
| Territory claimed by and (overlapping claims) | ||
| British Antarctic Territory, claimed by | ||
| Queen Maud Land, claimed by |