Peter Denning may refer to:

• Peter J. Denning (born 1942), computer scientist
• Peter Denning (cricketer) (1949–2007), cricketer for Somerset County Cricket Club

• 2003 Louisiana Tech Bulldogs football
• 2003 Louisiana Tech Bulldogs football season
• 2003 Louisiana–Monroe Indians football
• 2003 Louisiana–Monroe Indians football season
• 2003 Louisville Cardinals football
• 2003 Louisville Cardinals football season
• 2003 LSU Tigers football
• 2003 LSU Tigers football season
• 2003 Macau Grand Prix
• 2003 Maher
• 2003 Major League Baseball Draft
• 2003 Malaysia Premier 1 League
• 2003 Malaysia Premier League 1
• 2003 Malaysia Premier League 2
• 2003 Malta Open darts
• 2003 Marshall Thundering Herd football
• 2003 Marshall Thundering Herd football season
• 2003 Maryland Terrapins football
• 2003 Maryland Terrapins football season
• 2003 MasterCard Truck Series season
• 2003 Mbuji-Mayi air disaster
• 2003 McDonald's All-American Boys Game
• 2003 Melaka United season
• 2003 Melbourne runaway train
• 2003 Melilla Assembly election