- Dec 1 CFL Grey Cup, AAA Grounds, Hamilton: Hamilton Tigers win 3rd Cup with 30-0 shutout of Regina Roughriders
- Dec 1 National League President John Heydler first to propose a baseball rule change calling for a 10th man, or 'designated hitter', to bat in place of the pitcher; ironically, the NL vote in favour of proposal, but the American League turn it down
- Dec 1 Railroad museum opens in Utrecht, Netherlands
Bottomley NL MVP
Dec 2 St. Louis Cardinals future Baseball HOF first baseman Jim Bottomley is voted NL MVP
Attempt on Hoover Thwarted
Dec 11 Buenos Aires police thwart assassination attempt on President-elect Herbert Hoover - prevent anarchists from bombing his train
An American In Paris
Dec 13 George Gershwin's "An American In Paris" symphonic poem premieres at Carnegie Hall, NYC, performed by the New York Philharmonic conducted by Walter Damrosch
- Dec 16 National Football League Championship: Providence Steam Roller (8-1-2) win first past the post title
- Dec 17 John McGraw backs NL President John Heydler's designated hitter idea
- Dec 19 1st autogyro flight in US
- Dec 20 1st international dogsled mail leaves Minot, Maine for Montreal, Quebec
- Dec 20 Ethel Barrymore Theatre opens at 243 W 47th St NYC
- Dec 23 NBC sets up a permanent, coast-to-coast radio network
- Dec 24 George Abbott Theater (Adelphi, 54 St) opens at 152 W 54th St NYC
- Dec 25 NSW (v Vic) go from 8-74 to 9-113 to be 9-367 at stumps
Weissmuller Retires
Dec 26 Johnny Weissmuller announces his retirement from amateur swimming
- Dec 26 World record 10th wicket stand 307 (Kippax / Hooker) NSW v Vic
- Dec 28 Ma Rainey, "Mother of the Blues" makes her last record - "Big Feelin' Blues"
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