 , Rimini has 150,951 inhabitants, with a density of about 1,100 inhabitants per square kilometre within the city limits.In 1861, by the time of the first Italian census, the population was around 28,000; in 1931 it was more than double, 57,000.With the increasing tourism development, population rapidly grew between 1951 and 1981, the fastest growing period for Rimini in the 20th century, when the city's population grew from 77,000 to over 128,000.