- Dec 2 Kostas Stafylidis, Greek soccer left back (30 caps; 1899 Hoffenheim), born in Thessaloniki, Macedonia, Greece
- Dec 3 Marques Brownlee, American Youtuber (MKBHD) and ultimate frisbee player, born in Maplewood, New Jersey
- Dec 6 Elian Gonzalez, Cuban boy at the center of a heated 2000 controversy involving the governments of Cuba and the United States, born in Cuba
- Dec 6 Jasprit Bumrah, Indian cricketer and fast bowler (Mumbai Indians, India), born in Ahmedabad, Gujarat, India
- Dec 8 Anna Sophia Robb, American actress (Bridge to Terabithia; The Carrie Diaries), born in Denver, Colorado
- Dec 9 Wyndham Clark, American golfer (US Open 2023), born in Denver, Colorado
- Dec 13 Danielle Collins, American tennis player (World #8 2022; Australian Open 2022 runner-up), born in St. Petersburg, Florida
Jyoti Amge (30 years old)
Dec 16 Indian actress and world's shortest woman, born in Nagpur, India
- Dec 16 Stephan James, Canadian actor (Homecoming), born in Toronto, Ontario
- Dec 22 Aliana Lohan, American actress, born in The Bronx, New York
Gabriel Medina (30 years old)
Dec 22 Brazilian professional surfer (World Champion 2014), born in São Sebastião, São Paulo
- Dec 22 Meghan Trainor, American Grammy Award-winning pop singer-songwriter ("All About That Bass"), born in Nantucket, Massachusetts
- Dec 26 Pat Casey, American BMX rider (World C'ship gold Freestyle park BMX 2011; X Games gold dirt, BMX park 2021), born in Riverside, California (d. 2023)
- Dec 27 Olivia Cooke, English actress known for "House of the Dragon", born in Oldham, England
- Dec 29 Travis Head, Australian cricket all-rounder (Test HS 175, BB 4/10; ICC ODI World Cup 2023 Final MVP 137 [120]; South Australia), born in Adelaide, Australia
- Dec 31 Ryan Blaney, American auto racer (Daytona 500 2020 runner-up), born in Hartford Township, Trumbull County, Ohio
About December 1993
How Old? 30 years old
Generation: Millennial
Leap Year: No
Chinese Zodiac: Rooster
Star Signs: Sagittarius (Nov 22 - Dec 21), Capricorn (Dec 22 - Jan 19)
Greatest Generation
Silent Generation
Baby Boomer
Generation X
Millennial
Generation Z