The population in Slovenia is increasing and in 2020 amounted to 2,096 million. Natural increase has decreased (-5.2 persons per 1000 population). On the other hand the net migration of 6.2 persons per 1000 population ranks Slovenia 4th among the EU-27 Member States. Projections for the future show that by 2100 the population of Slovenia will decrease sharply (to 1,888,364).

The life expectancy in 2020 decreased due to the Covid-19 pandemic, which increased mortality rates, especially among individuals aged 60 and older. In 2021, life expectancy in Slovenia was 77.7 years for males and 83.8 years for females. Among the EU-27 countries, France (86.2) and Spain (86.2) recorded the highest life expectancy for females, while Sweden (81.3) had the highest life expectancy for males. The infant mortality rate per 1,000 live births in Slovenia in 2021 was 1.8, which is the lowest among all EU-27 countries.

In 2018, the ecological footprint of Slovenia was 5,37 gha per capita while biocapacity was 2.2 gha. For such a lifestyle 3.39 Earths would be required for the world's population to live within planetary regenerative capacity. This places Slovenia above the average of the EU countries (4.6 gha per capita). The carbon footprint usually accounts for around 60% of the total ecological footprint and therefore needs to receive comparatively more attention. According to consumption categories, housing and personal transportation contribute the most to the ecological footprint in Slovenia.