The history of the Jews in Bulgaria goes back almost 2,000 years. Jews have had a continuous presence in historic Bulgarian lands since before the 2nd century CE, and have often played an important part in the history of Bulgaria.

Today, the majority of Bulgarian Jews live in Israel, while modern-day Bulgaria continues to host a modest Jewish population.

Roman era

Jews are believed to have settled in the region after the Roman conquest in 46 CE. Ruins of "sumptuous" second-century synagogues have been unearthed in Philipopolis (modern Plovdiv), Nicopolis (Nikopol), Ulpia Oescus (Gigen, Pleven Province), and Stobi (now in North Macedonia). The earliest written artifact attesting to the presence of a Jewish community in the Roman province of Moesia Inferior is a late 2nd-century CE Latin inscription found at Ulpia Oescus bearing a menorah and mentioning archisynagogos. Josephus testifies to the presence of a Jewish population in the city. A decree of Roman Emperor Theodosius I from 379 regarding the persecution of Jews and destruction of synagogues in Illyria and Thrace is also proof of early Jewish settlement in Bulgaria.

1st & 2nd Bulgarian Empires After the establishment of the First Bulgarian Empire and its recognition in 681, a number of Jews suffering persecution in the Byzantine Empire may have settled in Bulgaria. At its maximum extent in the 9th century Bulgaria included 9th century sites associated with Jews such as Vojvodina, Crișana and Mihai Viteazu, Cluj. Jews also settled in Nikopol in 967.

Some arrived from the Republic of Ragusa and Italy, when merchants from these lands were allowed to trade in the Second Bulgarian Empire by Ivan Asen II. Later, Tsar Ivan Alexander married a Jewish woman, Sarah (renamed Theodora), who had converted to Christianity and had considerable influence in the court. She influenced her spouse to create the Tsardom of Vidin for her son Ivan Shishman, who was also a Jew according to Jewish law, which determines religion according to the mother. Despite her Jewish past, she was fiercely pro-Church, which in those times was accompanied with anti-semitism. For example, in 1352, the church council ordered the expulsion of Jews from Bulgaria for "heretical activity", (though this decree was not rigorously implemented). Physical attacks on Jews followed. In one case, three Jews who had been sentenced to death were killed by a mob despite the sentences having been repealed by the tsar.

The medieval Jewish population of Bulgaria was Romaniote until the 14th to 15th centuries, when Ashkenazim from Hungary (1376) and other parts of Europe began to arrive.

Ottoman rule

By the completion of the Ottoman conquest of the Bulgarian Empire (1396), there were sizable Jewish communities in Vidin, Nikopol, Silistra, Pleven, Sofia, Yambol, Plovdiv (Philippopolis) and Stara Zagora.

In 1470, Ashkenazim banished from Bavaria arrived, and contemporary travellers remarked that Yiddish could often be heard in Sofia. An Ashkenazi prayer book was printed in Saloniki by the rabbi of Sofia in the middle of the 16th century. Beginning in 1494, Sephardic exiles from Spain migrated to Bulgaria via Salonika, Macedonia, Italy, Ragusa, and Bosnia. They settled in pre-existing Jewish population-centres, which were also the major trade centres of Ottoman-ruled Bulgaria. At this point, Sofia was host to three separate Jewish communities: Romaniotes, Ashkenazim and Sephardim. This would continue until 1640, when a single rabbi was appointed for all three groups.

In the 17th century, the ideas of Sabbatai Zevi became popular in Bulgaria, and supporters of his movement, such as Nathan of Gaza and Samuel Primo, were active in Sofia. Jews continued to settle in various parts of the country (including in new trade centres such as Pazardzhik), and were able to expand their economic activities due to the privileges they were given and due to the banishment of many Ragusan merchants who had taken part in the Chiprovtsi Uprising of 1688.

Modern Bulgaria A modern nation-state of Bulgaria was formed under the terms of the Treaty of Berlin, which ended the Russo-Turkish War of 1877–78. Under the terms of that treaty, Bulgarian Jews of the new country were granted equal rights. In 1909, the massive and grand new Sofia Synagogue was consecrated in the presence of Tsar Ferdinand I of Bulgaria as well as ministers and other important guests, an important event for Bulgarian Jewry. Jews were drafted into the Bulgarian army and fought in the Serbo-Bulgarian War (1885), in the Balkan Wars (1912–13), and in the First World War. 211 Jewish soldiers of the Bulgarian army were recorded as having died during World War I. The Treaty of Neuilly after World War I emphasized Jews' equality with other Bulgarian citizens. In the 1920s and 1930s, fascist and anti-Semitic organizations like Rodna Zashtita and Ratnik were established and grew in influence.

In the years preceding World War II, the population growth rate of the Jewish community lagged behind that of other ethnic groups. In 1920, there were 16,000 Jews, amounting to 0.9% of Bulgarians. By 1934, although the size of the Jewish community had grown to 48,565, with more than half living in Sofia, that only amounted to 0.8% of the general population. Ladino was the dominant language in most communities, but the young often preferred speaking Bulgarian. The Zionist movement was completely dominant among the local population ever since Hovevei Zion.

World War II

Bulgaria, as a potential beneficiary from the Molotov–Ribbentrop Pact in August 1939, had competed with other such nations to curry favour with Nazi Germany by gestures of antisemitic legislation. Bulgaria was economically dependent on Germany, with 65% of Bulgaria's trade in 1939 accounted for by Germany, and militarily bound by an arms deal. Bulgarian extreme nationalists lobbied for a return to the enlarged borders of the 1878 Treaty of San Stefano. On 7 September 1940, Southern Dobruja, lost to Romania under the 1913 Treaty of Bucharest, was returned to Bulgarian control by the Treaty of Craiova, formulated under German pressure. A citizenship law followed on 21 November 1940, which transferred Bulgarian citizenship to the inhabitants of the annexed territory, including around 500 Jews, alongside the territory's Roma, Greeks, Turks, and Romanians.Zakon za ureždane na podanstvoto v Dobrudža, D.V., n° 263, 21.11.1940. This policy was not replicated in the territories occupied by Bulgaria during the war.

In 1939 Jews who were foreign citizens were forced to leave Bulgaria. This act marked the beginning of the Anti-Jewish propaganda and legislation. Starting in July 1940, Bulgarian authorities began to institute discriminatory policies against Jews. In December 1940, 352 members of the Bulgarian Jewish community boarded the S.S. Salvador at Varna bound for Palestine. The ship sank after running aground 100 metres off the coast of Silivri, west of Istanbul. 223 passengers drowned or died of exposure to frigid waters. Half of the 123 survivors were sent back to Bulgaria, while the remainder were allowed to board the Darien II and continue to Palestine, where they were imprisoned at Atlit by the British Mandate authorities.

A few days later, Tsar Boris III enacted the Law for Protection of the Nation, introduced to the Bulgarian Parliament the preceding October and passed by parliament on 24 December 1940, which imposed numerous legal restrictions on Jews in Bulgaria. The bill was proposed to parliament by Petar Gabrovski, Interior Minister and former Ratnik leader in October 1940. Come into force on January 24, 1941, it was written on the model of the Nuremberg Laws. The law forbade mixed marriages, the access to a set of professions and imposed a 20% additional tax of any Jewish property. Jews were obliged to "wear Davidic badges, to respect curfews, to buy food from particular shops, to avoid public areas and even to stop discussing political and social matters." They were persecuted alongside secret societies like the Freemasons.

Ratniks' protégé, government lawyer and fellow Ratnik, Alexander Belev, had been sent to study the 1933 Nuremberg Laws in Germany and was closely involved in its drafting. Modelled on this precedent, the law targeted Jews, together with Freemasonry and other intentional organizations deemed "threatening" to Bulgarian national security. Specifically, the law prohibited Jews from voting, running for office, working in government positions, serving in the army, marrying or cohabitating with ethnic Bulgarians, using Bulgarian names, or owning rural land. Authorities began confiscating all radios and telephones owned by Jews, and Jews were forced to pay a one-time tax of 20 percent of their net worth. The legislation also established quotas that limited the number of Jews in Bulgarian universities. The law was protested not only by Jewish leaders, but also by the Bulgarian Orthodox Church, some professional organizations, and twenty-one writers. Later that year in March 1941, the Kingdom of Bulgaria acceded to German demands and entered into a military alliance with the Axis powers.

The Law for the Protection of the Nation stipulated that Jews fulfil their compulsory military service in the labour battalions and not the regular army. Forced labour battalions were instituted in Bulgaria in 1920 as a way of circumventing the Treaty of Neuilly-sur-Seine, which limited the size of the Bulgarian military and ended conscription into the regular military. The forced labour service (trudova povinnost) set up by the government of Aleksandar Stamboliyski supplied cheap labour for government projects and employment for demobilised soldiers from the First World War. In the first decade of its existence, more than 150,000 Bulgarian subjects, "primarily minorities (particularly Muslims) and other poor segments of society" had been drafted to serve. In the 1930s, in the lead-up to the Second World War, the trudova povinnost were militarised: attached to the War Ministry in 1934, they were given military ranks in 1936.

After the start of war, in 1940 "labour soldiers" (trudovi vojski) were established as a separate corps "used to enforce anti-Jewish policies during World War Two" as part of an overall "deprivation" plan. In August 1941, at the request of Adolf-Heinz Beckerle – German Minister Plenipotentiary at Sofia – the War Ministry relinquished control of all Jewish forced labour to the Ministry of Buildings, Roads, and Public Works.Ruling n° 113, Council of Ministers, protocol 132, 12.08.1941. Mandatory conscription applied from August 1941: initially men 20–44 were drafted, with the age limit rising to 45 in July 1942 and to 50 a year later. Bulgarians replaced Jews in the commands of the Jewish labour units, which were no longer entitled to uniforms. On 29 January 1942, new all-Jewish forced labour battalions were announced; their number was doubled to twenty-four by the end of 1942. Jewish units were separated from the other ethnicities – three quarters of the forced labour battalions were from minorities: Turks, Russians, and residents of the territories occupied by Bulgaria – the rest were drawn from the Bulgarian unemployed.Dăržaven Voenno-Istoričeski Arhiv [State Military-Historical Archives] DVIA, F 2000, o 1, ae 57, l.57–74.