The 73rd parallel south is a circle of latitude that is 73 degrees south of the Earth's equatorial plane in the Antarctic. The parallel passes through the Southern Ocean and Antarctica.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 73° south passes through: ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes ! scope="row" rowspan="5" | Antarctica ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" rowspan="2" | Antarctica ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica