The Castle of Longroiva, in Beira Interior, is located in the parish and village of Longroiva, municipality of Meda, district of Guarda, in Portugal. Built to the south of the Côa River, in a dominant position over the village, it is an important testament to the Templar architecture in the region, being part of the Douro Sul Tourism Region.

It is believed that the primitive human occupation of its site dates back to a pre-Roman fort, built between the 4th and 2nd centuries BC. At the time of the Roman occupation, this settlement was called Longóbriga, when it would have been fortified. The Visigoths and Muslims would have done the same, who later occupied it.

At the time of the Christian Reconquest of the Iberian Peninsula, this settlement and its castle are related among the domains left to the Guimarães Monastery, in testament, by Flâmula Rodrigues, niece of Mumadona Dias (960). Scholars associate this donation with a restocking action initiated by the donor's father, Rodrigo Tedoniz, believing that the castle's primitive features can be traced back to this phase.

The parish church of Longroiva is of Manueline style (late gothic)