Birth Chart and Horoscope of March 21 births
- A'Darius Pegues
- Alain Garant
- Alexander Nelson
- Alfredo Escalera
- Ali Hamoudi
- Alina Wojtas
- Alisar Ailabouni
- Anders Linderoth
- Andriy Bednyakov
- Andy Bracek
- Andy Parker (musician)
- Andy Shallal
- Angel Gabriele
- Ann Mackay
- Anthony Cherrington
- Antoni Maria
- Asghar Kardoust
- Ayis Capéronis
- Benito Martinez
- Bhandit Rittakol
- Bob Bennett (singer-songwriter)
- Bob Casullo
- Bobby Thomson (footballer, born 1955)
- Bożena Nowakowska
- Bryan Bulaga
- Buck Zumhofe
- Carlos Monasterios
- Charles Thompson
- Cho Yong-pil
- Christoph Behr
- Christos Hatzis
- Cidny Bullens
- Conrad Lozano
- Cristian Bălgrădean
- Dan Kalman
- Daniel Rupf (footballer, born 1986)
- Danny Keane
- David Elebert
- David Parsons (racing driver, born 1955)
- David Solari (footballer)
- David Vázquez
- Denise Di Novi
- Derrick Low
- Dick Beardsley
- Diego Ferrín
- Diego García (footballer, born 1987)
- Donald Millán
- Draylen Ross
- Drew Perkins
- Edmond Budina
- Eduardo Pereira
- Edward Boches
- Edward Duyker
- Eufemio Cabral
- Exequiel Ezcurra
- Franklin Delano Floyd
- Franz Schiemer
- Germán Lanaro
- Ghotbeddin Sadeghi
- Glenn McDonald
- Gonzalo Fernández (Uruguayan politician)
- Gurhan Orhan
- Gustav Fröhlich
- Gustavo Lanaro
- Gökhan Değirmenci
- Hannibal Vaivao
- Hassan Najafi
- Hayley Sams
- Hiroshi Nishihara
- Håkan Lindström
- Ingrid Kristiansen
- Ivan Chergev
- Ivan Nagibin
- İrem Derici
- Jairo Álvarez Gutiérrez
- Je Jong-geel
- Jens-Kristian Sørensen
- Jesse Stone (Georgia politician)
- Jessica Paoletta
- Jiri Veistola
- Joel Tomkins
- John Holmes (rugby league)
- John N. Wozniak
- John Oddo
- Jon O'Donnell
- Jonathan Stewart
- Joseph Bambera
- Joseph Jones (basketball)
- Josepmir Ballón
- Julio Crisosto
- Karelle Vignon Vullierme
- Katarzyna Solus-Miśkowicz
- Kayacan Erdoğan
- Kazem HajirAzad
- Kenny Nims
- Kevin Weeks
- Koichi Iwaki
- Kouros Shahmiri
- Lamberto Alvarez
- Lance Ten Broeck
- Lee Cattermole
- Lim Sun-young
- Lindon Meikle
- Lloyd Maitland
- Louise Hanna-Walker
- Luiz Eduardo Rodrigues
- Lynne Winbigler
- Lévis Brien
- Maico Gerritsen
- Marc García
- Marcos García Barreno
- Maria Baghramian
- Marie-Christine Barrault
- Mark Zbikowski
- Martin Garot
- Martin Spelmann
- Marwan Farhat
- Matthew Foreman
- Maurice Coyne
- Max Farenthide
- Maxime Josse
- Mead Treadwell
- Michael A. Banks
- Michael Madl
- Michu
- Mike Dunleavy Sr.
- Mike Sutton (basketball)
- Milad Zeneyedpour
- Miriam Schaer
- Mirko Palazzi
- Mogens Larsen
- Mohammad Ali Taheri
- Monica De Coninck
- Musa Babayo
- Myron J. Cotta
- Nataliya Voronova
- Nguyễn Thế Thảo
- Nicolas Woodman
- Nikoleta Kyriakopoulou
- Norm Cook
- Omar Hussain
- Oscar Acosta (baseball)
- Osmar Ferreira Júnior
- Ossama Mohammed
- Parviz Karimi
- Pat McCabe (rugby union)
- Paul Hodes
- Paul Martin Lester
- Pauli Kuusijärvi
- Per Inge Torkelsen
- Pete Holmes (politician)
- Philippe Troussier
- Pixie Jenkins
- Prasad Kariyawasam
- Prayut Chan-o-cha
- Reginald Meeks
- Richard H. Kirk
- Rickey Anderson
- Roberto Alcántara
- Roberto Xalino
- Rocco Nacino
- Roger Köppel
- Ronen Palan
- Rosie O'Donnell
- Roy Ashburn
- Russell Thompkins Jr.
- Ryuhei Arita
- Réda Johnson
- S. P. Harper
- Santiago Martín Prado
- Sasa Disic
- Scott Simons
- Sergey Morozov (racewalker)
- Sergio Lais-Suárez
- Shoaib Laghari
- Siamand Rahman
- Silvia López Scoffie
- Simon Farine
- Stephanie Grant
- Stephen Coronel
- Steve Howard (sociologist)
- Steve Sheppard
- Suriya Kupalang
- Susi Sánchez
- Sándor Csernus
- Ștefan Tașnadi
- Tadayuki Takahashi
- Thodoris Berios
- Thorbjørn Holst Rasmussen
- Tiger Okoshi
- Tim Declercq
- Tony Wingate
- Vanessa Peretti
- Wendell Gibbs
- Will Brownsberger
- William Clarke (musician)
- Winford Stokes
- Wolfgang Mechler
- Xabi Irureta
- Yoshihiro Yonezawa