Interestingly, (click here) native inhabitants of Lithuania have never been replaced or pushed out by any other ethnic group since the Neolithic period. This means modern-day Lithuanians have much of the same genetic composition of their ancestors. Lithuania has a fairly homogeneous population with no apparent genetic differences between subgroups of ethnicities. A DNA analysis conducted in 2004 found that Lithuanians are closest to Finns, Estonians and Latvians.
Ethnic Lithuanians account for 5/6 of the population, which makes the country one of the most homogeneous in the Baltic States. The 2011 census found that 84% of the population was ethnic Lithuanians who spoke Lithuanian. Poles made up 6.6%, followed by Russians (5.8%), Belarusians (1.2%) and Ukranians (0.5%).
Poles are mostly concentrated in southeast Lithuania, while Russians are mostly in Vilnius and Klaipeda. There are approximately 3,000 Roma in Lithuania, as well as a small community of Tatar.