Rika Dialina (Greek: Ρίκα Διαλυνά; born Eirini Dialinna; 8 August 1931) is a Greek actress and beauty pageant titleholder who was crowned Star Hellas 1954 and then represented her country at Miss Universe 1954 in Long Beach, California.

Diallina, along with Miss Korea, Pu Rak Hi, were denied entry into the U.S. because of their alleged Communist affiliations. Dialina was disqualified from obtaining a U.S. visa for allegedly illustrating a book on Communism. In her place went first runner up, Effie Androulakakis, who won the Miss Friendship' award. U.S. Secretary of State John Foster Dulles intervened in Dialina's case and she was able to obtain a temporary entry permit. She arrived just a few days before the event, making the top 16 finalists. Effie Androulakakis was asked to remain in the competition as Miss Crete but she declined, stating that Dialina was "the choice the people of my country to represent them here." Dialina got married while in the U.S. and remained in the country.