- Jan 1 Jason Pierre-Paul, American NFL linebacker (Pro Bowl 2011-12; Super Bowl 2011, New York Giants), born in Deerfield Beach, Florida
- Jan 3 Anya Rozova [Anya Kop], Russian American model and America's Next Top Model contestant, born in Leningrad, USSR
- Jan 3 Alex D. Linz, American actor, born in Santa Barbara, California
- Jan 3 Kōhei Uchimura, Japanese gymnast (Olympic gold all-round 2012; team, all-round 2016; World C'ships 10 x gold), born in Kitakyushu, Japan
- Jan 3 Ben Matulino, New Zealand rugby league forward (23 caps; NZ Warriors, Wests Tigers), born in Wellington, New Zealand
- Jan 4 Graham Rahal, American race car driver, born in Columbus, Ohio
- Jan 5 Krisztián Németh, Hungarian footballer, born in Győr, Hungary
- Jan 6 Baby lion-tailed macaques, at Woodland Park Zoo (Seattle)
- Jan 7 Emiliano Insúa, Argentine footballer, born in Buenos Aires, Argentina
- Jan 9 Michaella Krajicek, Dutch tennis player, born in Delft, Netherlands
- Jan 13 Bryan Arguez, American soccer player
- Jan 13 Triinu Kivilaan, Estonian singer
- Jan 14 29-year-old Marie Claude Adam gives birth to sextuplets by Caesarean section in Port Royale, France
- Jan 20 Nick Foles, American NFL quarterback (Super Bowl LII MVP), born in Austin, Texas
- Jan 23 Yani Tseng, Taiwanese golfer (5 major titles; British Open 2010-11), born in Guishan, Republic of China
- Jan 25 Sheryfa Luna, French R&B singer, born in Évreux, France
- Jan 26 Emily Hughes, American figure skater, born in Great Neck, New York
- Jan 30 Khleo Thomas, American actor & rapper, born in Anchorage, Alaska
About January 1989
How Old? 31 years old
Generation: Millennial
Leap Year: No