Population in St. Gallen 15 indicators covering population for St. Gallen. IndicatorLatest Year10-yr change Rank Demographic balances and indicators by type of projection and NUTS 3 0.1785 % change on previous year 2100 up 151.2% 265th Heat stress - Cities and FUAs — Mean population exposure to heat 20.64 Days per year 2025 down 20.6% 773rd Assumptions for fertility rates by age, type of projection and NUTS 3 1.73 Number 2100 up 1.4% 571st Assumptions for net migration by age, sex, type of projection and 2,453 Person 2100 up 3.6% 81st Population on 1st January by age, sex, type of projection and NUTS 3 597,047 Person 2100 up 2.9% 172nd Population by age and sex - Cities and FUAs 88,239 Persons 2023 up 5.4% 1045th Population by citizenship - Cities and FUAs 33.7 Percentage of population 2024 up 14.6% 9th Foreign-born population - Cities and FUAs 37.3 Percentage of population 2024 up 11.0% 13th Population and built-up density - Cities and FUAs — Urbanised area 4 Square kilometres 2030 unchanged 1256th Live births (total) by NUTS 3 region 4,918 Number 2024 down 2.8% 640th Population density by NUTS 3 region 276.1 Persons per square kilometre 2024 up 9.1% 550th Population on 1 January by broad age group, sex and NUTS 3 region 540,036 Number 2025 up 8.9% 705th Population change - Demographic balance and crude rates at regional 4,399 2024 up 53.2% 440th Population on 1 January by age group, sex and NUTS 3 region 540,036 Number 2025 up 8.9% 704th Live births by age group of the mothers and NUTS 3 region 4,918 Number 2024 down 2.8% 640th