Cohort comparison · -109-year gap
Greatest Generation was born 1901–1927 and Generation Alpha 2010–2024, a gap of -109 years between the start of each cohort. In 2026 Greatest Generation is aged 99–125 and Generation Alpha is aged 2–16. The clearest difference is that Greatest Generation is defined by depression, world war, and post-war reconstruction while Generation Alpha is defined by the first generation born entirely in the 21st century.
Born between 1901 and 1927 and named by Tom Brokaw. Fewer than five million are still alive, all of them aged 99 or over.
The cohort born between 2010 and 2024 — the first born entirely in the 21st century, and the first raised with touchscreens and algorithmic feeds from infancy.
Side by side
| Greatest Generation | Generation Alpha | |
|---|---|---|
| Birth years | 1901–1927 | 2010–2024 |
| Age in 2026 | 99–125 | 2–16 |
| Cohort size | Under 5m | ~2.0bn |
| Defining shift | Depression, world war, and post-war reconstruction | The first generation born entirely in the 21st century |
| Age in 2050 | 123–149 | 26–40 |
| Cohort length | 27 years | 15 years |
| Status | Closed | Closed |
Greatest Generation covers births from 1901 to 1927 and Generation Alpha from 2010 to 2024. Depression, world war, and post-war reconstruction defines the first; The first generation born entirely in the 21st century defines the second.
In 2026, Greatest Generation is 99–125 and Generation Alpha is 2–16.
Greatest Generation is Under 5m and Generation Alpha 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