Just after World War I Odessa had a Jewish population of approximately 250,000, which accounted for 50 percent of the city’s inhabitants. The Jews were a thriving and vibrant community; there were 60 synagogues and Jewish thinkers and businesses flourished.
Odessa was home of men such as Isaac Babel, Chaim Nachman Bialik, Ahad Ha'am, Moses Leib Lilienblum, Mendel Mokher Seforim, Abraham Goldfaden, Jacob P. Adler, Vladimir Jabotinsky, Meier Dizengoff and Leo Pinsker among others.
By 1939, however, the Jewish population had dwindled to about 180,000, about a third of the city's and had retroceded to the 4th position in the world rank behind the Jewish populations of Warsaw, New York and Tel Aviv.
Many fled the city before its siege and surrender to the Axis powers in 1941, but around 100,000 (according to the USHMM estimates) were killed by the Romanian and German troops during the occupation on the city. Other sources estimate the number to 115,000.
In 1942 only 703 Jews still lived in Odessa.
After the war, Jews came back to the city but the Soviet government banned all religious activities and all communal or cultural life disappeared. According to the 1959 census, they were 106,700.
From 1968 several Jewish families were allowed to immigrate to Israel, following the increased demand for exit permits of Soviet Jews in the wake of the Six-Day War (1967). The 1989 census recorded 69,100 Jews in Odessa and in the 1990s most Jews emigrated.
In 2012 the Jews only amount 30,000 (a small 3% of the population). However, after the fall of the Soviet Union there was a renaissance of Jewish life. The Jewish community is today very active with three functioning Synagogues (one opened in 2012), a cultural center, a museum, an orphanage and several other institutions.