accommodated around 8,200 people of whom just under 3,000 lived in the city itself. All essential municipal institutions were built in just ten years, including a hospital and a city hall. At the same time, a rapid increase in brick houses was taking place in the centre of the city.
In the early 1920s the city gained possession of the grounds of the Lahti Manor, an important piece of land previously blocking the city from the lake. Large-scale industrial operations grew rapidly in the 1930s as did the population; Lahti, at the time, was one of Finland’s fastest-growing cities, and before the start of the Winter War its population was approaching 30,000.
Through the addition of new areas in 1924, 1933 and 1956, Lahti grew, both in terms of population and surface area. Especially strong was the growth after the wars, when Lahti accepted about 10,000 immigrants from Karelia, after the region was surrendered to the Soviet Union, and then later in the 1960 and 70's as a result of mass urbanization. The population growth came to a sharp end in 1975 and the city has since grown very little
