- Dec 1 Wendell Scott wins the Grand National Series Jacksonville 200 at Speedway Park in Jacksonville, Florida, becoming the first black driver to win a race at NASCAR's premier level
- Dec 2 1964 NFL Draft: Dave Parks from Texas Tech first pick by San Francisco 49ers
- Dec 2 MLB Rules Committee bans oversized catcher's mitts; rule effective only in 1965
- Dec 4 Boston Bruins' right wing Andy Hebenton sets a new NHL record by playing in his 581st consecutive game in 2-2 tie with Chicago Black Hawks; reaches 630 straight games
- Dec 6 Test Cricket debut of Graeme Pollock at the Gabba
- Dec 17 Ballon d'Or: Dynamo Moscow goalkeeper Lev Yashin wins award for best European football player; beats Milan midfielder Gianni Rivera and Tottenham striker Jimmy Greaves; first Russian national to win trophy
US Thrilling Victory
Dec 28 Davis Cup Men's Tennis, Adelaide: American Chuck McKinley beats Australia's John Newcombe 10-12, 6-2, 9-7, 6-2 in the deciding rubber to give US a thrilling 3-2 victory
Clark 1st Scot to Win
Dec 28 Scottish Lotus driver Jim Clark wins his record 7th Grand Prix of the F1 season, the South African event at Prince George Circuit; first Scotsman to win the World Drivers Championship
- Dec 29 National Football League Championship, Wrigley Field, Chicago: Chicago Bears beat New York Giants, 14-10; Giants 3rd consecutive championship defeat; played in temperatures under 10 °F (−12 °C)
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions