2003 in basketball
Champions
Professional
- Men
- *2003 NBA Finals: San Antonio Spurs over the New Jersey Nets 4-2. MVP: Tim Duncan
- **2002-03 NBA season
- **2003 NBA Playoffs
- *Eurobasket: Lithuania 93, Spain 84
- Women
- *WNBA: Detroit Shock over Los Angeles Sparks 2-1. MVP: Ruth Riley
- *Eurobasket Women: Russia def. Czech Republic
College
- Men
- *NCAA Division I: University of Syracuse 81, University of Kansas 78
- *National Invitation Tournament: University of Michigan
- *NCAA Division II: Northeastern State University 75, Kentucky Wesleyan College 64
- *NCAA Division III: Williams College 67, Gustavus Adolphus College 65
- *NAIA Division I Concordia 88, Mountain State 84 OT
- *NAIA Division II Oregon Tech 81, Bellevue 70
- Women
- *NCAA Division I: University of Connecticut 73, University of Tennessee 68
- *NCAA Division II: South Dakota State 65, Northern Kentucky University 60
- *NCAA Division III Trinity University 60, Eastern Connecticut State 58
- *NAIA Division I: Southern Nazarene 71, Oklahoma City University 70
- *NAIA Division II Hastings 59, Dakota Wesleyan 53
Awards and honors
- Class of 2003:
- * Leon Barmore
- * Francis D. "Chick" Hearn
- * Earl F. Lloyd
- * Meadowlark Lemon
- * Dino Meneghin
- * Robert L. Parish
- * James A. Worthy
- Class of 2003
Professional
- Men
- *NBA Most Valuable Player Award: Tim Duncan
- *NBA Rookie of the Year Award: Amar'e Stoudemire
- *NBA Defensive Player of the Year Award: Ben Wallace
- *NBA Coach of the Year Award: Gregg Popovich, San Antonio Spurs
- *Euroscar Award: Dirk Nowitzki, Dallas Mavericks and
- *Mr. Europa: Šarūnas Jasikevičius, Maccabi Tel Aviv and
- Women
- *WNBA Most Valuable Player Award: Lauren Jackson, Seattle Storm
- *WNBA Defensive Player of the Year Award: Sheryl Swoopes, Houston Comets
- *WNBA Rookie of the Year Award: Cheryl Ford, Detroit Shock
- *WNBA Most Improved Player Award: Michelle Snow, Houston Comets
- *Kim Perrot Sportsmanship Award: Edna Campbell, Sacramento Monarchs
- *WNBA Coach of the Year Award: Bill Laimbeer, Detroit Shock
- *WNBA Finals Most Valuable Player Award: Ruth Riley, Detroit Shock
Collegiate
- Combined
- *Legends of Coaching Award: Roy Williams, Kansas
- Men
- *John R. Wooden Award: T. J. Ford, Texas
- *Naismith College Coach of the Year: Tubby Smith, Kentucky
- *Frances Pomeroy Naismith Award: Jason Gardner, Arizona
- *Associated Press College Basketball Player of the Year: David West, Xavier
- *NCAA Basketball Tournament Most Outstanding Player: Emeka Okafor, Connecticut
- *USBWA National Freshman of the Year: Carmelo Anthony, Syracuse
- *Associated Press College Basketball Coach of the Year: Tubby Smith, Kentucky
- *Naismith Outstanding Contribution to Basketball: Charles “Lefty” Driesell
- Women
- *Naismith College Player of the Year: Diana Taurasi, Connecticut
- *Naismith College Coach of the Year: Gail Goestenkors, Duke
- *Wade Trophy: Diana Taurasi, Connecticut
- *Frances Pomeroy Naismith Award: Kara Lawson, Tennessee
- *Associated Press Women's College Basketball Player of the Year: Diana Taurasi, Connecticut
- *NCAA Basketball Tournament Most Outstanding Player: Diana Taurasi, UConn
- *Basketball Academic All-America Team: Kristine Austgulen, VCU
- *Carol Eckman Award: Marsha Sharp, Texas Tech University
- *USBWA National Freshman of the Year: Seimone Augustus, LSU
- *Associated Press College Basketball Coach of the Year: Geno Auriemma, Connecticut
- *List of Senior CLASS Award women's basketball winners: LaToya Thomas, Mississippi State
- *Nancy Lieberman Award: Diana Taurasi, Connecticut
- *Naismith Outstanding Contribution to Basketball: Betty Jaynes
Events
Deaths
- January 20 — Dan King, American NBA player
- January 29 — John Murphy, American BAA player
- February 9 — John Hyder, American college coach
- March 29 — Carl Ridd, Canadian Olympic player
- April 16 — Jewell Young, All-American college player, NBL player
- May 14 — Dave DeBusschere, American Hall of Fame NBA player
- May 14 — Al Fleming, American NBA player
- May 23 — Weenie Miller, American college coach
- May 29 — Anthony Frederick, American NBA player
- June 16 — David Polansky, American college coach
- June 22 — John Mandic, American NBA player
- September 20 — Ernie Calverley, All-American player and coach at Rhode Island
- October 16 — Chet Jaworski, All-American player
- October 23 — Kevin Magee, Former All-American at UC Irvine and Maccabi Tel Aviv player
- October 30 — Stan Szukala, American NBL player
- November 21 — Bill Haarlow, American NBL player
- December 8 — Chuck Noe, American college coach
- December 9 — Norm Sloan, College basketball coach of the 1974 national champion NC State Wolfpack
- December 26 — Gale Bishop, All-American college and BAA player