Paragraph: The rank-size rule is somewhat valid for Haiti. The some of the estimated numbers are close to the actual size and other cities are not close to their actual size. One example is Port-de-Paix this city's estimated size was 308,681. Port-de-Paix actual size is 250,000 which is close to the estimated. Population: 10,485,800 Population density: 388.65 % Urban population: 59% % Urban population living in Slums: 74% Average % change in urban population: 3.4% % with improved urban sanitation: 97% % with improved urban water supply: 65%