Demographic features of the population of Lithuania include population density, ethnicity, level of education, health, economic status, and religious affiliations.
The population of Lithuania increased after the end of World War II, reaching its apex in 1991 with 3.7 million, but started to decline after the Dissolution of the Soviet Union later that year, which negatively impacted the country. As social problems ensued after the dissolution of the Soviet Union, the birth rate decreased and the population fell sharply due to a relatively high death rate, mass emigration and a large increase of its suicide rate that made Lithuania one of the countries with the highest suicide rates in the world. This caused its population to drop below 3 million in 2012, losing over a quarter of its population in 30 years. As of today, Lithuania's fertility rate is one of the lowest in the world. However, while its suicide rate would remain the highest in the European Union, it dropped over time, and in the 2020's, the Lithuanian population would return to grow slightly due to immigration and a decreasing death rate.
