Before the 1950s, there were many Jewish people in Kurdistan. There were 19 Jewish communities in Iranian Kurdistan in 1948. Most Jewish people left Kurdistan after that time, but there is still a population of Jews in Iranian Kurdistan. Iranian Jewish Kurds were more integrated with local people than Jews in the rest of Iran were. In the 1950s, there were 3,000–4,000 Jewish Kurds in Iran. Most of the Jews in Iranian Kurdistan lived in the cities of Sanandaj, Kermanshah and Urmia. Many of them were physicians or merchants. After the Islamic Revolution in Iran, many Jews left Iranian Kurdistan.