- Jan 1 Communist uprising in West Java
- Jan 1 Dodgers announce release of future Hall of Fame Zack Wheat
- Jan 1 Turkey adopts the Gregorian calendar: December 18, 1926 (Julian), is immediately followed by January 1, 1927 (Gregorian).
- Jan 1 13th Rose Bowl: Stanford ties Alabama, 7-7
- Jan 5 Fox Studios exhibits Movietone
- Jan 5 Judge Landis begins 3-day public hearing on charges that 4 games played between Chicago & Detroit in 1917 had been thrown to White Sox
- Jan 6 US marines return to Nicaragua
- Jan 7 Commercial transatlantic telephone service inaugurated between New York & London
- Jan 7 Harlem Globetrotters play their 1st game in Hinckley, Illinois
- Jan 9 Dmitri Shostakovitch' Octet opus 11 premieres in Moscow
- Jan 9 Fire in Laurier Palace cinema in Montreal, 78 children died
- Jan 10 Fritz Lang's silent film "Metropolis" premieres in Berlin
- Jan 11 Royale Theater (Golden, CBS Radio Playhouse) opens at 242 W 45th NYC
- Jan 13 US & Mexico battle over oil interests
- Jan 14 Toronto Maple Leafs 1st hat trick (Hap Day) vs NY Rangers
- Jan 15 The Tennessee Supreme Court overturns (on a technicality) John T. Scopes' guilty verdict for teaching evolution — but the law itself remains in force
- Jan 19 British government decides to send troops to China
- Jan 21 1st national opera broadcast from a US opera house (Faust, Chicago)
Film Release
Jan 24 Alfred Hitchcock releases his first film as director - The Pleasure Garden, in England
Alfred Hitchcock
- Jan 26 Maxwell Anderson's play "Saturday's Children" premieres in New York City
- Jan 27 20th Women's Australian Championships: Esna Boyd beats Sylvia Lance Harper (5-7, 6-1, 6-2)
- Jan 27 20th Men's Australian Championships: Gerald Patterson beats John Hawkes (3-6, 6-4, 3-6, 18-16, 6-3)
- Jan 28 Serbian-Croatian-Slavic government of Oezonowitsj falls
- Jan 29 4th German government of Marx forms
- Jan 30 Left wins national election in Thuringen
- Jan 31 Internationall allied military command in Germany disbands
- Jan 31 NL President John Heydler rules Rogers Hornsby can't hold stock in the Cardinals & play for the Giants