- Jan 1 Ali Bastian, English actress and model
- Jan 1 Emi Kobayashi, Japanese model
- Jan 1 Park Sung-hyun, South Korean archer (Olympics gold individual/team 2004, team 2008; women's WR in a FITA Round 1,405 points), born in Gunsan, South Korea
- Jan 2 Kate Bosworth, American actress (Superman Returns), born in Los Angeles, California
- Jan 5 Sean Dockery, American basketball player, born in Chicago, Illinois
- Jan 7 Brett Dalton, American actor (Agents of S.H.I.E.L.D.), born in San Jose, California
- Jan 7 Liesbeth Mouha, Belgian beach volleyball player, born in Tongeren, Belgium
- Jan 7 Natalie Gulbis, American golfer (ANA Inspiration 2006 3rd), born in Sacramento, California
- Jan 8 Chris Mordetzky, American wrestler, born in Santa Monica, California
- Jan 8 Felipe Colombo, Argentine-Mexican pop-rock singer (Erreway), and actor, born in Mexico City, Mexico
Kim Jong-un (40 years old)
Jan 8 North Korean politician and Supreme Leader of North Korea (2011-), born in Pyongyang, North Korea [note some sources give year as 1982, and some as 1984]
- Jan 9 Kerry Condon, Irish actress (The Banshees of Inisherin), born in Thurles, Ireland
- Jan 10 Danilo Dirani, Brazilian racing driver, born in São Paulo, Brazil
- Jan 10 Li Nina, Chinese aerial free-style skier, born in Benxi, China
- Jan 11 Adrian Sutil, German racing driver, born in Starnberg, Germany
- Jan 11 Matthew Palleschi, Canadian soccer player, born in Richmond Hill, Canada
- Jan 13 Julian Morris, English actor
- Jan 13 Ronny Turiaf, French basketball player
- Jan 13 William Hung, American Idol contestant
- Jan 14 James Vincent McMorrow, Irish singer-songwriter, born in Dublin, Ireland
- Jan 14 Maxime Monfort, Belgian cyclist, born in Bastogne, Belgium
- Jan 14 Vincent Jackson, American NFL wide receiver (Pro Bowl 2009, 11, 12; SD Chargers, TB Buccaneers), born in Colorado Springs, Colorado (d. 2021)
- Jan 15 Hugo Viana, Portuguese footballer, born in Barcelos, Portugal
- Jan 15 Jermaine Pennant, English footballer, born in Nottingham, United Kingdom
- Jan 16 Emanuel Pogatetz, Austrian footballer, born in Graz, Austria
- Jan 17 Alvaro Arbeloa, Spanish footballer, born in Salamanca, Spain
- Jan 17 Andrea Lowell, American model, born in Long Beach, California
- Jan 17 Johannes Herber, German basketball player, born in Darmstadt, Germany
- Jan 17 Rick Kelly, Australian racing driver, born in Mildura, Australia
- Jan 17 Yelle [Julie Budet], French electro-pop singer and rapper (Yelle), born in Saint-Brieuc, France
- Jan 18 Katie White, British pop musician (The Ting Tings - "That's Not My Name"), born in Lowton, England
- Jan 18 Samantha Mumba, Irish pop and R&B singer ("Gotta Tell You") and actress (The Time Machine), born in Dublin, Ireland
- Jan 19 Hikaru Utada, American-born Japanese singer-songwriter, born in NYC, New York
- Jan 19 Justyna Kowalczyk, Polish cross-country skier (Olympic gold 30k classical 2010, 10k classical 2014), born in Limanowa, Poland
- Jan 20 Geovany Soto, Puerto Rican baseball player, born in San Juan, Puerto Rico
- Jan 20 Mari Yaguchi, Japanese singer (Morning Musume), born in Yokohama, Japan
- Jan 20 Paula Taylor, Thai actress & model, born in Bangkok, Thailand
- Jan 21 Maryse Ouellet, French Canadian model and professional wrestler
- Jan 21 Moritz Volz, German footballer
- Jan 21 Peter Philipakos, Greek-American soccer player
- Jan 22 Robert Steinhäuser, German perpetrator of the Erfurt massacre (d. 2002)
- Jan 22 Shaun Cody, American football player, born in Whittier, California
- Jan 23 Adam Mosseri, American head of Instagram, born in New York
- Jan 24 Scott Speed, American race car driver, born in Manteca, California
- Jan 24 Shaun Maloney, Scottish soccer midfielder (47 caps; Celtic), born in Miri, Malaysia
- Jan 25 Andrée Watters, Canadian pop-country-rock singer, born in Quebec City, Quebec
- Jan 25 Brian Armstrong, American businessman (CEO and co-founder of Coinbase), born in San Jose, California
- Jan 27 Carlo Colaiacovo, Canadian ice hockey player
- Jan 27 Gavin Floyd, American baseball player
- Jan 27 Mike Zagurski, American baseball player
- Jan 28 David Williams, Wakka Wakka Australian didgeridoo player and visual artist, born in Rockhampton, Queensland, Australia
- Jan 31 James Sutton, British television actor, born in Sutton Coldfield, United Kingdom
- Jan 31 Tom Vangeneugden, Belgian swimmer, born in Overpelt, Belgium
About January 1983
How Old? 40 years old
Generation: Millennial
Leap Year: No