Dinko Ranjina (also Domenico Ragnina) (1536–1607) was a Dalmatian Italian poet from the Republic of Ragusa. In 1556 he was accepted into the Republic's ruling Grand Council. He was married to the sister of Frano Lukarević (Francesco Luccari Burina).
Ranjina was born and died in Ragusa. He travelled to Messina in the hopes of taking up trade and eventually made his way to Florence. It was in Florence that he began to write.
He wrote extensively in Italian (about 30 sonnets) in the collection Rime scelte da diversi eccelenti autori from 1563. Ragnina later stamped in Florence the famous Versione Illirica with Ludovico Dolce. He even wrote the Croatian songbook Pjesni razlike with about 450 small poems (and because of this he is considered a Croatian author of the Croatian literature).