ARA Patagonia was an armoured cruiser that served in the Argentine Navy between 1886 and 1927.

Patagonia was ordered in 1885 to the shipyard Stabilimento Tecnico Triestino in Trieste at a cost of £ 100,000; this transaction was widely criticized in Argentina as the Austro-Hungarian navy was purchasing ships in England rather than locally.

After finalizing trials, it departed Trieste on January 20, 1887, arriving in Buenos Aires on February 28 same year.

In January and February 1902 it participated in the naval exercises as part of the 3rd Division; it simulated a blockade of the River Plate in which it was successful.

By 1918 all weapons are removed and it is modified function as a transport ship under the same name, completing two trips between Buenos Aires and Ushuaia until being decommissioned in 1925.