Wikipedia says

Statistics Canada defines Generation Z as starting with the birth year 1993. Statistics Canada does not recognize a traditional Millennials cohort and instead has Generation Z directly follow what it designates as Children of Baby boomers (born 1972–1992).

Randstad Canada describes Generation Z as those born between 1995–2014. Australia's McCrindle Research Centre defines Generation Z as those born between 1995–2009, starting with a recorded rise in birth rates, and fitting their newer definition of a generational span with a maximum of 15 years. A 2014 report from Sparks and Honey describes Generation Z as those born in 1995 or later. Author Jean Twenge describes the iGen as those born after 1995.

In their 2011 book How Cool Brands Stay Hot, authors Joeri van den Bergh and Mattias Behrer define Generation Z as those born after 1996. In Japan, generations are defined by a ten-year span with "Neo-Digital natives" beginning after 1996.

The Futures Company, marketing agency Frank N. Magid Associates, Ernst and Young, Turner Broadcasting, and The Shand Group use 1997 as the first year of birth for this cohort, with Frank N. Magid considering the cohort to extend to at least 2014.

A 2016 report from multinational banking firm Goldman Sachs describes Generation Z as those born since 1998.

MTV described Generation Z as those born after December 2000, for a survey conducted by the network regarding possible names for the cohort.

Author Neil Howe defines the cohort as people born from approximately 2005–2025, but describes the dividing line between Generation Z and Millennials as "tentative" saying, "you can’t be sure where history will someday draw a cohort dividing line until a generation fully comes of age". He said that the Millennials' range beginning in 1982 points to the next generation's window starting between 2000 and 2006.