when does cooper flagg turn 19

Cooper Flagg turns 19 years old on December 21, 2025.

Quick Scoop

• Cooper Flagg’s confirmed date of birth is December 21, 2006.

• That means his 19th birthday falls on December 21, 2025.

• As of late 2025 sources, he is listed as 18 years old, consistent with that birthdate.

Extra Context

Biographical profiles and player pages all list December 21, 2006 as his birthday, aligning with major reference sites and basketball bios. Some fan and popularity sites already tag him as 19 once that December 21 date passes in their local time or for the current year, but the underlying birthdate is the same.

TL;DR: Cooper Flagg will hit his 19th birthday on December 21, 2025.

Information gathered from public forums or data available on the internet and portrayed here.