Birth Chart and Horoscope of August 21 births
- Adam O'Brian
- Adri Ruiz
- Akihiko Takeshige
- Alaa Aladdin Mumohamed Elghobashy
- Aleix Vidal
- Alejandro Terrones
- Alexandru Ichim
- Amy Fisher
- Ananda Omesh
- Anderson Martins
- Andrea Chong
- Andrés Pablo Fernández
- Annie Chandler (swimmer)
- April Diamond
- Arduino Tiraboschi
- Arthur do Val
- Barry Smith (ice hockey, born 1952)
- Ben Onwukwe
- Ben Tate
- Beth Nolan
- Bo Burnham
- Bodil Niska
- Brandon Bays
- Brooks Wheelan
- Brunny Gomes
- Bruno Gabriel Soares
- Bruno Pinheiro
- Cary Adgate
- Cecilie Løveid
- Charles Jaco
- Charlison Benschop
- Chesley V. Morton
- Chesster Chay
- Chng Seng Mok
- Choi Man-hee
- Christiane Reppe
- Cindy Roleder
- Clayton Forsey
- Coco (cartoonist)
- Cody Kasch
- Cristóvão Tezza
- D-Jay
- Daiki Nishioka
- Daniele Resca
- Danielle Castaño
- David Alan Gore
- David Knight (cricketer)
- David Pollet
- David Reed (soccer)
- Denis Chachkhalia
- Denton Zubke
- Dimitris Giovanakis
- Dmytro Kremin
- Dominik Ascherbauer
- Dominique Senequier
- Ederson Bruno Domingos
- Edgar Moreira da Cunha
- Edgar Urquizo
- Ekaterina Khuraskina
- Elina Vaseva
- Elizabeth Alexander (actress)
- Elliot Soto
- Ena Sandra Causevic
- Facundo Castillón
- Ferenc Paragi
- Fernando Gómez Esparza
- Franco Balbi
- François Pinault
- Gaetano Berardi
- Garry Cowmeadow
- Gary Punch
- Gautam Radhakrishna Desiraju
- George T. Odom
- Giuseppe Bellusci
- Glenn Hughes
- Greg Cannom
- Guy Coeme
- Gérard Janvion
- Géza Szőcs
- Haji Musa Khan
- Hatem Yassen
- Hayden Panettiere
- Hermann Kopp
- Houssem Eddine Sdiri
- Ioan Hora
- Isaías Peralta
- Itacaré (footballer)
- Ivan Stang
- JJ Smuts
- Jaco Kriel
- Jaideep Singh
- Jair Amador
- Jake Hansen (ice hockey)
- Jane Fernandes
- Jared Crick
- Jay D. Scott
- Jeff Blynn
- Jeff Stryker
- Jerry Ragonese
- Jin Taiyan
- Joanna Mitrosz
- Jodie Meeks
- John Howe (illustrator)
- John Stearns
- Jolanshoy McDowall
- Jon Tester
- José Julián Sacramento
- Juan Guzman (boxer)
- Juliette Pardau
- Keith Hart (wrestler)
- Ken Mettler
- Kenny Adamson
- Kerser
- Kevin Alderson
- Kiko (footballer, born 1988)
- Kim Ki-bum
- Kirk Speraw
- Kiros Stanlley Soares Ferraz
- L. Rafael Reif
- Laura Moisă
- Laura Morante
- Leandro Freire de Araújo
- Leonardo Ramos (footballer, born 1989)
- Lois Moorcroft
- Louise Setara
- Lukas Meijer
- Maialen Zelaia
- Manfred Neun
- Manuel Kanté
- Marco Armellino
- Margo Kane
- Mark Pender
- Mark Wright (rugby league)
- Marnie Hudson
- Martin Bezuidenhout
- Mason Trafford
- Massimo Palanca
- Matteo Gentili
- Megan Montaner
- Michael Darragh MacAuley
- Michal Ravitz
- Mickey Shuler
- Mu Tunç
- Nader Al Atat
- Ngoako Ramatlhodi
- Nnaemeka Anyanwu
- Noelia López
- Nyasha Mushekwi
- Olayinka Sanni
- Paolo Bartolomei
- Paris Bennett
- Patrick Dellit
- Paul Maguire (footballer)
- Paule Brunelle
- Per Andersson (biathlete)
- Philip Mirowski
- Piao Cheng
- Pravin Singh
- Radu Pamfil
- Rafiq Bhatia
- Rasmus Lyberth
- Ray Waddy
- Rene Swette
- Reuben Jeffery III
- Ricardo Ramina
- Richard Dumas (ice hockey)
- Richie Zito
- Rico Murray
- Ridha Grira
- Roberto Marroquin
- Robin Selvig
- Ross Reid (cyclist)
- Rossouw de Klerk
- Ryan Peters (footballer)
- Sara Omar
- Shaun Tomson
- Sidiki Kaba
- Solomon Mire
- Sorina Nwachukwu
- Stephan Schröck
- Stijn Steels
- Tadeusz Małolepszy
- Tarek Amer
- Tekkami Atchuta Rao
- Tess Gaerthé
- Tom Colley
- Tomasz Lipiński
- Tony Hatzis
- Tsutomu Sekine
- Tu Holloway
- V. Lowry Snow
- Vadão
- Valentin Lazăr
- Vidar Nisja
- Wan Khalmizam
- Whitney Sloan
- Windu Hanggono Putra
- Youri Ziffzer
- Zheng Xun
- Zsolt Kiss