- Dec 1 Andrew Tate, American-British media personality and kickboxer, born in Washington D.C.
- Dec 1 DeSean Jackson, American NFL wide receiver (Pro Bowl 2009-10, 13; Philadelphia Eagles), born in Los Angeles, California
- Dec 2 Claudiu Keșerü, Romanian soccer forward (37 caps; FC Nantes, Steaua București), born in Oradea, Romania
- Dec 2 Tal Wilkenfeld, Australian musician (Jeff Beck, Prince), born in Sydney, Australia
- Dec 3 Chandra Shekhar Aazad, Indian lawyer and activist (Bhim Army), born in Ghadkauli, Uttar Pradesh
- Dec 6 Matt Niskanen, American NHL player (Philadelphia Flyers), born in Virginia, Minnesota
- Dec 7 Billy Horschel, American golfer (FedEx Cup 2014, 5 PGA Tour titles), born in Grant, Florida
- Dec 8 Amir Khan, English boxer, born in Bolton, United Kingdom
- Dec 8 Jo Firestone, American actress (Joe Pera Talks With You), television writer (The Tonight Show, 2016-18), and podcaster, born in St. Louis, Missouri
- Dec 8 Kate Voegele, American folk-pop-rock singer songwriter, guitarist, and mandolin player, born in Bay Village, Ohio
- Dec 10 Natti Nastasha [Natalia Gutiérrez Batista], Dominican singer (Sin Pijama), born in Santiago de los Caballeros, Dominican Republic
- Dec 10 Ryoichi Tsukada, Japanese acrobat, born in Kanagawa, Japan
- Dec 11 Condola Rashad, American actress (Ruined, Billions), born in New York City
- Dec 12 Përparim Hetemaj, Finnish footballer, born in Srbica, SFR Yugoslavia
- Dec 12 Thomas Wansey, English actor (Ace Lightning), born in Oxford
- Dec 15 Keylor Navas, Costa Rican soccer goalkeeper (100 caps 2021; Lavante UD, Real Madrid, Paris Saint-Germain), born in Pérez Zeledón, Costa Rica
- Dec 15 Snejana Onopka, Ukrainian supermodel, born in Sievierodonetsk, Soviet Union
- Dec 19 Lauren Boebert, American politician and gun rights advocate (Rep-R-Colorado 2021-), born in Altamonte Springs, Florida
- Dec 19 Ryan Babel, Dutch soccer winger (69 caps; Ajax, Liverpool, Hoffenheim, Kasımpaşa, Beşiktaş, Galatasaray), born in Amsterdam, Netherlands
- Dec 22 Jeffery Wood, American actor (Austin Warren-In The House), born in San Diego, California
- Dec 24 Edward Southall, English contemporary classical composer, born in Nottingham, England
- Dec 24 Riyo Mori, Japanese actress and model (Miss Universe 2007), born in Shizuoka, Japan
Kit Harington (37 years old)
Dec 26 English actor (Game of Thrones), born in London, England
- Dec 27 Metrik [Tom Mundell], British electronic dance music producer and re-mixer ("Freefall"; "Gravity"; “Chasing Sunrise”), born in London, England
Shelly-Ann Fraser-Pryce (37 years old)
Dec 27 Jamaican athlete (Olympic gold 100m 2008, 12; 9 x World C'ship gold), born in Kingston, Jamaica
Ellie Goulding (37 years old)
Dec 30 English singer and songwriter ("Lights", "Anything Could Happen"), born in Hereford, England
- Dec 30 Jeff Ward, American actor (Agents of S.H.I.E.L.D., 2017-20), born in Washington, D.C.
About December 1986
How Old? 37 years old
Generation: Millennial
Leap Year: No
Chinese Zodiac: Tiger
Star Signs: Sagittarius (Nov 22 - Dec 21), Capricorn (Dec 22 - Jan 19)
Greatest Generation
Silent Generation
Baby Boomer
Generation X
Millennial
Generation Z