Tartessian is an extinct Paleo-Hispanic language found in the Southwestern inscriptions of the Iberian Peninsula, mainly located in the south of Portugal, and the southwest of Spain. There are 95 such inscriptions, the longest having 82 readable signs. Around one third of them were found in Early Iron Age necropolises or other Iron Age burial sites associated with rich complex burials. It is usual to date them to the 7th century BC and to consider the southwestern script to be the most ancient Paleo-Hispanic script, with characters most closely resembling specific Phoenician letter forms found in inscriptions dated to c. 825 BC. Five of the inscriptions occur on stelae that have been interpreted as Late Bronze Age carved warrior gear from the Urnfield culture.

The Southwest Script or Southwestern Script, also known as Tartessian, South Lusitanian and Conii script is a Paleohispanic script used to write an unknown language usually identified as Tartessian. Southwest inscriptions have been found mainly in the southwestern quadrant of the Iberian Peninsula, mostly in the south of Portugal, but also in Spain.