Orcadas Station, Antarctic research station on Laurie Island, South Orkney Islands, Antarctica

Orcadas Station is an Argentine scientific base on Laurie Island in the South Orkney Islands, 170 metres from the coast and 4 metres above sea level. Its eleven buildings stand around Omond House, the stone hut with a tarred canvas roof raised by the Scottish expedition in 1903. Research at the LABORC laboratory covers continental and sea-ice-zone glaciology, seismology and meteorology.

The facility was founded in 1903 by the Scottish National Antarctic Expedition as Omond House and taken over by Argentina in 1904. The continuity of occupation since then makes it one of the oldest continuously inhabited stations in Antarctica.

The station's chapel, Stella Maris, hosted the first Catholic Mass celebrated in Antarctica, said by Jesuit Felipe Lérida on 20 February 1946; he raised an 8-metre cross and telegraphed the news to the Pope. A postal office named Orcadas del Sud was created in January 1904, and Hugo Acuña carried its stamps, forms and postmark south with the Scotia. The base has been permanently staffed since 1904, and its radio station LRT kept the winter crew in contact with Ushuaia from 1927.

Up to 45 researchers work on site during summer months, while around 14 staff members remain during winter. Regular supply missions from Ushuaia keep the station stocked with materials and rotating personnel.

In 1927, the station established the first radio telegraph connection in Antarctica. This breakthrough technology linked the remote facility with mainland communication networks for the first time.