The race of people is one of the branches of Aryan race. Their language is Persian. The dialect is very closed to Tehran dialect, and Qomi dialect is little by little forgotten. But the immigrants of Qom speak Farsi and their own dialect.
Religion:
The people of Qom like the other people of Iran followed Zoroaster, Before Islam.
The existence of Navis, kermijegan, langarud, and chahak fire places confirmed this idea. According to the historical documents people of Qom embraced Islam from the entrance of Islam to Iran, they has been the followers of the innocent Imams.

Source: Qom Cultural Heritage and Tourism Organization