Because of official suppression of nationality statistics, little information was available on less numerous minorities in Bulgaria between 1965 and 1990. Most of the Tatar population (6,430 in 1965) had migrated from the Crimea to the cities of the Dobruja area in the nineteenth century. The Greek minority (8,241 in 1965) comprised political émigrés from Greece and the remainder of a population in southern Bulgaria that had been largely forced out of Bulgaria by government oppression and violence between the world wars. The Armenian population (20,282 in 1965) was mostly added between 1896 and 1924 during the massive emigration of Armenians from the Ottoman Empire. The Armenians were concentrated in the cities, especially Sofia and Plovdiv. In 1946 some 44,209 Jews remained in Bulgaria, which had conducted no large-scale persecution despite its wartime alliance with Nazi Germany. But the 1950s saw massive emigration of Jews to Israel, leaving only 5,108 in Bulgaria by the time of the 1965 census.
Data as of June 1992