Locator: 48720DEMOG.
Demographics are tracked here.
Of note, this year, 2025, and perhaps last year, 2024, is the last birth year for Generation Alpha.
Generation Alpha: as early as 2010 through 2025. Some sources specify 2013 as the start date and an ending year of 2028.
Generation Beta (often shortened to Gen Beta) is the proposed name for the demographic cohort succeeding Generation Alpha.
The name was coined by futurist and demographer Mark McCrindle (who also coined the name Generation Alpha). [Brilliant. I wonder what it takes to be a "futurist"?] He defines the cohort as those born from 2025 to 2039.
Researchers have not yet formed a general consensus as to the generation's birth years; since no official body determines generational boundaries, definitions may vary. Link here.