Cohort comparison · -96-year gap
Greatest Generation was born 1901–1927 and Generation Z 1997–2009, a gap of -96 years between the start of each cohort. In 2026 Greatest Generation is aged 99–125 and Generation Z is aged 17–29. The clearest difference is that Greatest Generation is defined by depression, world war, and post-war reconstruction while Generation Z is defined by the first cohort to reach adolescence with a smartphone.
Born between 1901 and 1927 and named by Tom Brokaw. Fewer than five million are still alive, all of them aged 99 or over.
Born 1997–2009 on the boundaries used here, Gen Z is the last cohort with any memory of a pre-smartphone world and the first to reach adolescence on social media.
Side by side
| Greatest Generation | Generation Z | |
|---|---|---|
| Birth years | 1901–1927 | 1997–2009 |
| Age in 2026 | 99–125 | 17–29 |
| Cohort size | Under 5m | ~2.0bn |
| Defining shift | Depression, world war, and post-war reconstruction | The first cohort to reach adolescence with a smartphone |
| Age in 2050 | 123–149 | 41–53 |
| Cohort length | 27 years | 13 years |
| Status | Closed | Closed |
Greatest Generation covers births from 1901 to 1927 and Generation Z from 1997 to 2009. Depression, world war, and post-war reconstruction defines the first; The first cohort to reach adolescence with a smartphone defines the second.
In 2026, Greatest Generation is 99–125 and Generation Z is 17–29.
Greatest Generation is Under 5m and Generation Z is ~2.0bn.
There is no boundary between these two directly unless they are adjacent cohorts. Boundaries are conventions set by McCrindle Research, not official definitions, and other frameworks draw them a year or two apart.
Other comparisons