Aragon was an Aragon-class unprotected cruiser of the Spanish Navy in the late 19th century.

In 1870, her design was changed to that of an unprotected cruiser or wooden corvette,[1][3] and she finally was launched in this form on 31 July 1879 and completed in 1880[1] Her original conception as an armored ship and the change to an unarmored one during construction left her with an overly heavy wooden hull that was obsolescent by the time of her launch.

[4] Her machinery was manufactured by the John Penn Company of Greenwich, United Kingdom.

[1] The original main battery of Armstrong-built 8-inch (203 mm) guns was obsolescent when she was completed, and were quickly replaced with more modern Hontoria-built 6.4-inch (163 mm) guns (a heavier main battery than that carried by her two sisters Castilla and Navarra), at least four of which were mounted in sponsons.

Sources differ on her ultimate fate; either she was sold for scrap in 1900[1] or stricken c. 1905[4]