- Jan 4 Gage Munroe, Canadian actor (I Declare War), born in Toronto, Ontario
- Jan 10 Mason Mount, English footballer (England, Chelsea FC), born in Portsmouth, England
- Jan 13 Nasa Hataoka, Japanese golfer (Women's PGA C'ship 2018 runner-up), born in Ibaraki, Japan
- Jan 18 Karan Brar, American actor (Diary of a Wimpy Kid; Bunk'd), born in Redmond, Washington
- Jan 19 Christone “Kingfish” Ingram, American Blues guitarist and singer (662), born in Clarksdale, Mississippi
- Jan 29 Madison Bailey, American actress (Outer Banks), born in Kernersville, North Carolina
About January 1999
How Old? 24 years old
Generation: Generation Z
Leap Year: No