The 55th parallel south is a circle of latitude that is 55 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, the Indian Ocean, the Pacific Ocean and South America.
At this latitude the sun is visible for 17 hours, 22 minutes during the December solstice and 7 hours, 10 minutes during the June solstice.
Starting at the Prime Meridian and heading eastwards, the parallel 55° south passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Atlantic Ocean | ||
| Indian Ocean | ||
| Pacific Ocean | Passing just south of Macquarie Island, Australia | |
| Chile | Islands of Gilbert, Londonderry, London, Thompson, Gordon, Hoste, Navarino and Picton | |
| Beagle Channel | ||
| Argentina | Isla Grande de Tierra del Fuego | |
| Atlantic Ocean | Passing just south of Isla de los Estados, Argentina Passing just south of South Georgia, South Georgia and the South Sandwich Islands |
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