- Jan 1 79th Orange Bowl: #13 Florida State beats #16 Northern Illinois, 31-10
- Jan 1 99th Rose Bowl: #8 Stanford beats Wisconsin, 20-14
Carlsen Breaks Kasparov Record
Jan 1 Magnus Carlsen breaks Garry Kasparov's chess FIDE rating, reaching 2,861
Spain's Fourth Title
Jan 5 25th Hopman Cup Tennis, Perth: Spain wins 4th title; Anabel Medina Garrigues & Fernando Verdasco beat high profile Serbian pair Ana Ivanović & Novak Đoković 6-4, 7-5 to clinch 2-1 victory
Messi Wins Record Fourth
Jan 7 FIFA Ballon d'Or: Barcelona forward Lionel Messi wins award for a record 4th consecutive year; US forward Abby Wambach wins women's award
Nash 5th to 10,000 Assists
Jan 8 Steve Nash becomes 5th NBA player to record 10,000th career assists, playing for the LA Lakers against Houston - Lakers still lose 125–112
- Jan 12 "Mile High Miracle", In AFC Divisional Playoff Game Denver Broncos ahead of Baltimore Ravens 35-28 with 1:09 remaining, quarterback Joe Flacco heaves 70 yard touchdown pass to receiver Jacoby Jones to tie the game. Ravens win in overtime.
Armstrong's Doping Downfall
Jan 19 Lance Armstrong admits to doping in all seven of his Tour de France victories
- Jan 19 The 2012-2013 NHL season begins after a 119-day lockout
- Jan 20 AFC Championship, Gillette Stadium, Foxborough: Baltimore Ravens beat New England Patriots, 28-13
- Jan 20 NFC Championship, Georgia Dome, Atlanta: San Francisco 49ers beat Atlanta Falcons, 28-24
Azarenka Defeats Li
Jan 26 Australian Open Women's Tennis: Victoria Azarenka of Belarus wins her 2nd straight Australian title; beats Li Na of China 4-6, 6-4, 6-3
- Jan 27 7 people are killed and 3 are injured when a retaining wall collapses during a football match at the Ugur Sports Facility, Turkey
- Jan 27 Australian Open Men's Tennis: Novak Đoković wins Open era record 4th Australian crown; beats Andy Murray of Scotland 6-7, 7-6, 6-3, 6-2
Carlsen Wins Tata Steel Tournament
Jan 27 Magnus Carlsen wins the 2013 Tata Steel Chess Tournament in Wijk aan Zee, Netherlands
- Jan 27 NFL Pro Bowl, Aloha Stadium, Honolulu, Hawaii: NFC beats AFC, 62-35; MVP: Kyle Rudolph, Minnesota Vikings, TE
- Jan 27 Spain defeats Denmark to win the 2013 World Men's Handball Championship