- Dec 2 Juice Wrld [Jarad Higgins], American rapper and singer-songwriter (All Girls Are the Same, Lucid Dreams), born in Chicago, Illinois (d. 2019)
- Dec 5 Conan Gray, American singer-songwriter (Sunset Season), born in Lemon Grove, California
- Dec 17 Martin Odegaard, Norwegian footballer, youngest to play for Real Madrid, born in Drammen, Norway
Kylian Mbappé
Dec 20 Kylian Mbappé, French soccer forward (France, PSG, Monaco), born in Paris, France
Dylan Wang
Dec 20 Dylan Wang [Wang Hedi], Chinese actor and singer (Meteor Garden), born in Chengdu, Sichuan
- Dec 27 Briar Nolet, Canadian actress and dancer (The Next Step, Blood Hunters), born in Toronto, Ontario
- Dec 29 Danny Wagner, American drummer (Greta Van Fleet), born in Frankenmuth, Michigan
- Dec 31 Hunter Schafer, American model, actress and LGBTQ activist, born in Trenton, New Jersey
About December 1998
How Old? 23 years old
Generation: Generation Z
Leap Year: No
Chinese Zodiac: Tiger
Star Signs: Sagittarius (Nov 22 - Dec 21), Capricorn (Dec 22 - Jan 19)