Birth Chart and Horoscope of December 21 births
- Adolf Hirnschal
- Alan Glen
- Alan Wynne Williams
- Aldo Parecchini
- Alessandra Usman
- Alexa Goddard
- Alexandro Pozzer
- Alfred Kałuziński
- Ali Sarfraz
- Anastasios Christofileas
- Andrew Rutherfurd (swimmer)
- András Schiff
- Andrés Már Jóhannesson
- Andrés Romero (Argentine footballer)
- Anna Erlandsson
- Asher Wojciechowski
- Asif Saeed Khosa
- Augusto Monterroso
- Barbara Fialho
- Ben O'Connor (ice hockey)
- Betty Wright
- Bjarne Berntsen
- Bob Barry Jr.
- Bodo Andreass
- Bolívar Modualdo Guedes
- Brad Tavares
- Brandon Banks
- Brandon James
- Brandon Mosley
- Carl Allen (American football)
- Carlos Alberto Galeana
- Cheikhou Kouyaté
- Claude Vincendeau
- Cody Stanley
- Cornel Predescu
- Craig Loston
- Dan Bullock
- Danny Duffy
- Dave Laut
- David McHugh
- David Monsalve
- Dennis Boutsikaris
- Devon Ericson
- Dioni
- Dominique Cabrera
- Douhou Pierre
- Dwight Ball
- Eduardo Nava Bolaños
- Emma Tenayuca
- Erick Kabu
- Erik Sowinski
- Ervin Demeter
- Erwin Isaacs
- Erwin Rüddel
- Éric Valli
- Étienne Chouard
- Faye Hanohano
- Federica Radicchi
- Felix Gasselich
- Fernando Fernández García
- Gabriel Sîncrăian
- Gao Zengxiang
- Garry Dulson
- Gebhard Gritsch
- Georges Balandier
- Giovanna Huyke
- Greta Schiller
- Grete Keilson
- Gustavo García-Siller
- Gysie Pienaar
- Günter Keute
- Hany Shaker
- Harald Feuchtmann
- Heinrich Böll
- Ingrid Schjelderup (footballer)
- Ivan Parker
- James E. Hubbard, Jr.
- Jan-Åke Carlberg
- Jane How
- Jay Johnson (pitcher)
- Jayson Terdiman
- Jefferson Viveros
- Jennifer Colón
- Jim Weider
- John Seigenthaler
- Johnny Lozada
- Jonathan David Gómez
- Jonathan Grimes
- Jorien ter Mors
- José Diego Álvarez
- József Szekó
- Jürgen Stiefel
- Kai Arne Engelstad
- Karel Marquez
- Kazuki Murakami
- Kazuyuki Sekiguchi
- Kenth Karlsson
- Kerry Sanderson
- Keshya Nurvita Hanadia
- Kevin Anderson (basketball)
- Kevin Burnham
- Khris Davis
- Kiefer Sutherland
- Kieran Murphy (footballer)
- Käte Fenchel
- Larry Eyler
- Lee Roy Parnell
- Linda Chisholm
- Linda McCulloch
- Lisa Gerritsen
- Lukas Thürauer
- Makoto Saitō (designer)
- Marcus Capers
- Marcus Davis (American football)
- Margaret Stride
- Maria Ulfah
- Mario Kröpfl
- Mark Beevers
- Mark Ingram Jr.
- Markeith Cummings
- Marsha Thomson
- Mary Jean Eisenhower
- María Elena Noriega Blanco
- Micaela Reis
- Michael Lewis (model)
- Michael Pote
- Mike Bellotti
- Mike Berenstain
- Miklós Szabó (judoka)
- Mitsuhiro Miyakoshi
- Mohammed Al-Siyabi
- Mordechai Yissachar Ber Leifer
- Nadine Secunde
- Nana Takeda
- Nancy A. Moran
- Nkandu Luo
- Norbert Janzon
- Odd Brochmann
- Omar Basaad
- Ousmane Viera
- Paco de Lucía
- Paola Pérez
- Paul Cooper (footballer, born 1953)
- Paul Kurtz
- Perri Shakes-Drayton
- Peter Darke
- Peter Marsh (ice hockey)
- Przemysław Gintrowski
- Putut Waringin Jati
- Quinta Brunson
- R.O.E.
- Rajitha Wickramarachchi
- Rayan (footballer)
- Reinhard Jahn
- Ren Long
- Rick Jore
- Roger Blake
- Rolf Kanies
- Ronan Finn
- Ryza Cenon
- Samuel L. Jackson
- Serge Lindier
- Sergei Karimov
- Sevan Nişanyan
- Shalva Gachechiladze
- Sharon Skinner
- Shelley Regner
- Shilpa Singh
- Shinji Tajima
- Sophie Reiser
- Stan Lambert
- Stephen Brendan McMahon
- Stephen G. McFarland
- Steve Furniss
- Subir Bhattacharjee
- Sylvie Lespérance
- Sébastien Siani
- Takuya Matsuura
- Tamannaah
- Teresa Ruiz (actress)
- Terry Mills
- Thirachai Phuvanatnaranubala
- Tim Progosh
- Tino Sunseri
- Toby Mao
- Tom Clarke (footballer, born 1987)
- Tom Collen
- Tom Henke
- Tony Kerr
- Tsurutaro Kataoka
- Tsvetelin Radev
- Ute Christensen
- Valerie Concepcion
- Wafula Oguttu
- Wayne Ford
- Wilger Saboya
- Yo Mahesh
- Yves Détraigne
- Zeynel Mungan
- Zoe Buckman