Birth Chart and Horoscope of January 21 births
- Aaron Grundy
- Adam Krzysztofiak
- Adi Soffer
- Alan Jones (footballer, born 1951)
- Alessandro Bernardini
- Alexander Dercho
- Alexander Klöpping
- Alfonso Moreno Morán
- Amal Athulathmudali
- Ana Maria Magalhães
- Ana Moura (badminton)
- Andre Ewell
- Andrew Browne (rugby union)
- Andrew Forde
- Andrew J. Richards
- Anna Barsukova (model)
- Anoja Weerasinghe
- Anthony Sichi
- Arif Karaoğlan
- Armand Gega
- Artur Dmitriev
- Ashley Sippala
- Ashton Eaton
- Aslan Darabayev
- Atilio Herrera
- Ángel Mena
- Benoît Tardieu
- Bill Grimsey
- Billy Ocean
- Bobby Houston (footballer, born 1952)
- Brandon Crawford
- Brian Partridge
- Bruno Pauletto
- Carlos Louis Fallas
- Charles (footballer, born 1954)
- Charles Legget
- Charles Thomas (basketball, born 1986)
- Constance Laux
- Cornelius Greene
- Cui Kai (footballer)
- Dale A. Drozd
- Danielli Pereira da Silva
- Darren Forsyth
- Darren Helm
- David Marusek
- David Peach
- Dominic Oppong
- Dominik Roels
- Don Droege
- Eddie McAshan
- Elie Tahari
- Elizabeth Erny Foote
- Felipe Neto
- Felipe Yáñez
- Ferenc Obreczán
- Forrest Gander
- Frank A. Jenssen
- Frank Pineda
- François Boutin
- Garry Madders
- Gary Locke
- Gerry Forrest
- Ghazwan Jassem
- Glaiza de Castro
- Glenn Remick
- Goran Paracki
- Greg Martin
- Greg Wren
- Hans Montag
- Henrico Drost
- Henry Azra
- Hubert Pawłowski
- Ineya
- Irwin Cohen
- Isabelle Nanty
- Iñigo Pérez
- Jacob Green
- Jamel Saihi
- James Lawson (footballer)
- Javi López
- Jay-R Siaboc
- Jeb Stuart (writer)
- Jeff Franklin
- Jeroen Drost
- Jesús Ancer Rodríguez
- Jim Troy (ice hockey)
- Joe Howe (footballer)
- Joe Parsons
- John Early (comedian)
- John Mercer (American politician)
- Jonathan Quick
- Joseph R. Tanner
- Joseph F. Cotton
- João Gomes Júnior
- Judit Kéri-Novák
- Julie Christensen
- Kamal Anis
- Karl Wallenda
- Kei Nakano
- Ken Yamamura
- Kevin Kratz
- Kirin J. Callinan
- Klaus Meyer (rower)
- Kris Stephens
- Kyle Nix
- Lachlan Norris
- Leandro Brasília
- Leslie Hoffman
- Liam Feeney
- Lidiia Soloviova
- Lola Flores
- Louis Moolman
- Luigina Bissoli
- Marc W. Butler
- Marco Antonio Xicoténcatl
- Marie-Arlette Carlotti
- Marion Becker
- Martin Donovan (screenwriter)
- Masoud Rayegan
- Matteo Merini
- Matthew Lopez
- Michael S. Malone
- Michalis Prodromou
- Mickaël Gaffoor
- Miguel Aguilar Obando
- Mike Keating (ice hockey)
- Mike Smithson (baseball)
- Mike Taylor (basketball)
- Mohamad Al Hasan
- Mohammed Showqi Al-Islambouli
- Mulopo Kudimbana
- Neil Shepard
- Nello Musumeci
- Nemia Kenatale
- Niki Østergaard
- Norbert Pallua
- Norden Tenzing Bhutia
- Norman Botton
- Ozu Moreira
- Óscar Vílchez
- Pablo Caballero González
- Park Tae-min
- Patricia Kihoro
- Paul Allen
- Penny Severns
- Percy Howard
- Peter Fleming (tennis)
- Peter Ritzen
- Peter Woods (footballer)
- Petre Purima
- Peyton Hillis
- Phil Greatwich
- Phil Loadholt
- Plácido Domingo
- Popo (footballer, born 1988)
- Preston Claiborne
- Richie Hawkyard
- Richie Ranno
- Rick Dowswell
- Robby Benson
- Robert Gray (footballer, born 1951)
- Robert S. Nelsen
- Robin Wikman
- Roger Joe
- Roger W. Stoller
- Ron Anderson (ice hockey, born 1950)
- Rosemary Shrager
- Roy Tunks
- Ryszard Słomski
- Sadegh Nojouki
- Saeid Daghighi
- Sergei Ogorodnikov
- Shaun Keeling
- Shota Horie
- Skip Brown
- Sushant Singh Rajput
- Tajhon Mailata
- Talaat Youssef
- Tales Cerdeira
- Thomas Franke
- Thomas Vikström
- Thomas de Maizière
- Tipper Newton
- Tom Urbani
- Tony Potrac
- Tony Ridler
- Trey Kramer
- Urvesh Patel
- Vanessa Hessler
- Veselin Nanev
- Vincenzo Lombardo
- Walt Richardson
- Wayne Matle
- Werner Grissmann
- Will Johnson (soccer)
- Willie Gates
- Włodzimierz Mucha
- Yuri Yuryevich Lebedev
- Yury Astravukh
- Yvon Dumont