Cuba is a town and municipality in the District of Beja in Portugal. The population in 2011 was 4,878, in an area of 172.09 km. The current …Cuba is a town and municipality in the District of Beja in Portugal. The population in 2011 was 4,878, in an area of 172.09 km. The current mayor is João Português. The municipal holiday is Monday after Easter.