The diplomatic relations between the Portuguese Republic and Romania date back to 1917, having been interrupted following World War II, before being re-established in June 1974, following the Carnation Revolution in Portugal.

Portugal and Romania, although countries located at the two extremes of Europe, had at one point been part of the Roman Empire and have had numerous approaches and connections throughout history.

In December 1919, Portugal opened the Portuguese Legation to the Balkans, based in Bucharest, and with jurisdiction over Serbia and Greece, as well as Romania.

[2] The deposed king of Romania, Carol II, would live in Estoril, in Portugal during his exile, where he would eventually pass away.

[1] Since the re-establishment of diplomatic relations between the two countries, several bilateral agreements were signed, including:[2] Following the re-establishment of diplomatic relations between the two countries in 1974, several-high level visits took place, starting in 1975, with official visits being carried out in that year by the respective heads of state.