Rab is a town on the island of Rab in Croatia. According to the 2011 census the total population of the town was 8,065, whereas only 437 …Rab is a town on the island of Rab in Croatia. According to the 2011 census the total population of the town was 8,065, whereas only 437 lived in the titular settlement. Rab, the settlement, is located on a small peninsula on the southwestern side of the island.