Monaco. According to COUNTRYAAH, Monaco has a population of 38,682 (2018). The head of state, Prince Albert, announced in June that he was engaged to South African swimmer Charlene Wittstock. The 52-year-old Albert previously had a reputation for being a bachelor and playboy. Since joining the throne in 2005, he has acknowledged two extra-marital children, who, however, have no right to inherit the throne. Wittstock, who was 32 at the time of the engagement, competed in the 2000 Olympics.