In 2012 The FEZANA Journal, a quarterly publication of the Federation of Zoroastrian Associations of North America had published a demographic picture of Zorastrians around the world and a comparison with a similar study done in 2004.
The study is available on FEZANA's website for download
^According to a survey in 2004 by the Zoroastrian Associations of North America, the number of Zoroastrians worldwide was estimated at between 124,000 and 190,000. The number is imprecise because of wildly diverging counts in Iran. Goodstein, Laurie (2008-09-06). "Zoroastrians Keep the Faith, and Keep Dwindling". The New York Times. Retrieved 2009-10-03.