- Aug 1 Darryl Hall, CFL linebacker (Calgary Stampeders), born in Oscoda, Michigan
- Aug 1 Horacio de la Peña, Argentinian tennis star and coach, born in Buenos Aires, Argentina
- Aug 2 Joseph Wanag, American judoka (Olympic-92), born in Wilton, Connecticut
- Aug 2 Tim Wakefield, American baseball pitcher (MLB All-Star 2009; World Series 2004, 07 Boston Red Sox) and broadcaster (NESN), born in Melbourne, Florida (d. 2023) [1]
- Aug 3 Eric Esch, American boxer, born in Atlanta, Georgia
- Aug 6 Billy Mayfair, American golfer (Tour Championship 1995), born in Phoenix, Arizona
- Aug 8 Chris Eubank, English boxer (WBO middleweight and super-middleweight titles), born in London, England
- Aug 8 John Hudek, American baseball player
- Aug 9 Vinny Del Negro, American NBA guard (San Antonio Spurs) and coach (Chicago Bulls), born in Springfield, Massachusetts
- Aug 10 Gerald Williams, American MLB baseball outfielder, 1992-2005 (NY Yankees, and 5 other teams), born in New Orleans, Louisiana (d. 2022)
- Aug 11 Antonio Goss, American NFL linebacker, 1989-96, 2X Super Bowl winner (San Francisco 49ers), born in Randleman, North Carolina
- Aug 11 Nigel Martyn, English soccer goalkeeper (23 caps; Crystal Palace, Leeds, Everton), born in St Austell, Cornwall
- Aug 12 Bruce Covernton, Canadian CFL defensive tackle (Calgary Stampeders), born in Morris, Manitoba
- Aug 12 Dean Hartgraves, American baseball pitcher (Houston Astros), born in Bakersfield, California
- Aug 12 Greg Manusky, American NFL coach (Denver Broncos) and linebacker (KC Chiefs), born in Dallas, Pennsylvania
- Aug 12 Vladimir Fedotov, Russian soccer manager (FC Ural Yekaterinburg, FC Orenburg, PFC Sochi, CSKA Moscow) and utility (FC Ural Yekaterinburg 264 games), born in Mikhaylovsk, Russia
- Aug 13 Miguel Miranda, Peruvian soccer goalkeeper (47 caps; Sporting Cristal) and coach (Alianza Atlético), born in Lima, Peru (d. 2021)
- Aug 13 Shayne Corson, Canadian NHL forward (Team Canada Olympics 1998, Montreal), born in Midland, Ontario, Canada
- Aug 14 Freddy Rincón, Colombian soccer midfielder (84 caps; Santa Fe, América de Cali, SC Corinthians), born in Buenaventura, Valle del Cauca, Colombia (d. 2022)
- Aug 14 Karl Petter Løken, Norwegian footballer, born in Karlskoga, Sweden
- Aug 15 Fred Strickland, American NFL linebacker, 1988-99 (Los Angeles Rams, Dallas Cowboys, and 3 other teams), born in Buffalo, New York
- Aug 16 Ed Olczyk, NHL center (Winnipeg Jets), born in Chicago, Illinois
- Aug 16 Rosey Edeh, Canadian 400m hurdler (Olympics-4-92, 96), born in London, England
- Aug 16 Terry Shumpert, infielder (Chicago Cubs), born in Paducah, Kentucky
- Aug 17 Cedric Figaro, American football linebacker (Amsterdam Admirals), born in Lafayette, Louisiana
- Aug 17 Don Sweeney, Canadian ice hockey defenseman (Boston Bruins) and executive (GM Boston Bruins), born in St. Stephen, New Brunswick
- Aug 17 Rodney Mullen, American skateboarder ("Godfather of modern freestyle skating"; 35 x world titles), born in Gainesville, Florida
- Aug 17 Zefross Moss, American NFL tackle (Detroit Lions, NE Patriots), born in Tuscaloosa, Alabama
- Aug 18 Steve Avery, American football running back (Pittsburgh Steelers), born in Milwaukee, Wisconsin
- Aug 20 Steven Finn, Canadian NHL defenseman (LA Kings), born in Laval, Quebec, Canada
- Aug 21 John Wetteland, American pitcher (NY Yanks, Rangers, Expos), born in San Mateo, California
- Aug 22 Rob Witschge, Dutch soccer star (Ajax/Feyenoord), born in Amsterdam
- Aug 23 Rik Smits, NBA center (Indiana Pacers), born in Eindhoven, Netherlands
- Aug 24 Jon Sieben, Australian swimmer (Olympic gold 200m butterfly 1984), born in Brisbane, Queensland
- Aug 25 Albert Belle, American baseball outfielder (Cleveland Indians; 5-time MLB All-Star), born in Shreveport, Louisiana
- Aug 26 Jacques Brinkman, Dutch field hockey player
- Aug 27 Deena Wigger, US shooter (Olympic-92), born in Colorado Springs, Colorado
- Aug 30 John Terry, Canadian CFL tackle (Saskatchewan Roughriders), born in Greenwood, North Carolina
- Aug 31 Jeff Frye, American MLB infielder (Boston Red Sox), born in Oakland, California
- Aug 31 Zdenko Morović, Venezuelan soccer midfielder (5 caps; Deportivo Italia, CS Marítimo, Caracas FC), born in Rijeka, Croatia (d. 2024)
About August 1966
How Old? 57 years old
Generation: Generation X
Leap Year: No