The 64th parallel south is a circle of latitude that is 64 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and the Antarctic mainland, the latter as the most northern latitude. At this latitude the sun is visible for 21 hours, 1 minute during the December solstice and 4 hours, 12 minutes during the June solstice.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 64° south passes through: ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean ! scope="row" | Antarctica ! scope="row" style="background:#b0e0e6;" | Southern Ocean