The municipality of Trosa in Sörmland county is projected to experience the highest percentage population growth in Sweden by 2040, according to Statistics Sweden's (SCB) latest population forecast. The forecast, which extends to 2040, indicates Trosa will grow by 20 percent, making it the fastest-growing municipality in the country on a percentage basis.
Kungälv follows in second place with an expected 17 percent growth, while Uppsala ranks third with 15 percent growth. Sörmland county as a whole is expected to increase by over 12,500 inhabitants compared to 2024 levels, though growth patterns vary significantly between municipalities within the county.
The SCB forecasts are based on estimates of future births, mortality rates, and immigration/emigration patterns, providing an indication of how Sweden's population may change in the coming years. According to the forecast, Sweden's total population is expected to increase by 420,000 people by 2040.
Resident Monica Sörensen, who moved to Trosa 13 years ago from Sollefteå, expressed little surprise at the municipality's attractiveness, citing both aesthetic appeal and safety as key factors. 'The aesthetics make a huge difference, and you can go out in the evening without being worried,' she told SVT.
While Trosa shows strong growth, other municipalities in Sörmland present mixed results. Strängnäs is also expected to see significant growth, while Eskilstuna shows weak growth, and Flen and Vingåker are projected to experience population decline.