Adherents
Small but thriving Zoroastrian communities are found in India, Pakistan and Iran, and throughout a worldwide diaspora. Zoroastrian communities in the diaspora comprise two main groups of people: those of South Asian Zoroastrian background, who are known as Parsis (or Parsees), and those of Iranian background.

Zoroastrians in Iran have, like other religious minorities, survived centuries of persecution. Communities exist in Tehran, as well as in Yazd and Kerman, where many still speak an Iranian language distinct from Persian. They call their language Dari (not to be confused with the Dari of Afghanistan). Their language is also called Gabri or Behdinan. Sometimes their language is named for the cities in which it is spoken, Yazdi or Kermani.

Parsis in South Asia have, by contrast, enjoyed relative tolerance. While the communities there are socioeconomically diverse, Parsis have gained a reputation for their education and widespread influence in all aspects of (especially Indian) society.

In addition, there is a growing interest among Kurdish people of various national backgrounds, as well as peoples in various Central Asian countries such as Tajikistan and Kazakhstan, in their ancient Zoroastrian heritage; many people in these countries now consider themselves Zoroastrian. In fact, UNESCO (at the instigation of the government of Tajikistan) declared 2003 a year to celebrate the "3000th Anniversary of Zoroastrian Culture," with special events throughout the world.

Small but fast growing Zoroastrian communities exist in major urban areas in the United States, Canada, England, Australia, and other countries.

The worldwide population figures for Zoroastrians have been estimated at anywhere between 180,000 and 250,000. NOTE: diaspora or worldwide population figures include both Parsis and Iranians; there is no way to estimate numbers of Parsis alone except when referring only to India. India's 2001 Census found 69,601 Parsi Zoroastrians. North America is thought to be home to 18,000-25,000 Zoroastrians of both Parsi and Iranian background. Iran's figures of Zoroastrians have ranged widely.