In 1947 Opatija was given to Yugoslavia as part of the peace treaty with Italy; most of the Italian-speaking population, whose percentage had substantially increased in the past years, emigrated to Italy.
1947 yılında Opatija Yugoslavya'ya verildi; geçmiş yıllarda önemli ölçüde artmış İtalyan konuşan nüfusun çoğu İtalya'ya göç etti.