College championship
College football national championship – Harvard Crimson
Brazil
Santos FC, officially founded on April 14.
England
The Football League – Blackburn Rovers 49 points, Everton 46, Newcastle United 44, Bolton Wanderers 43, The Wednesday 41, Aston Villa 41
20th April: FA Cup final – Barnsley 1–0 West Bromwich Albion at Crystal Palace, London (replay following 0–0 draw at Crystal Palace)
Germany
National Championship – Holstein Kiel 1–0 Karlsruher FV at Hamburg-Hoheluft
Iceland
Iceland's premier division, now known as Landsbankadeild, is established with KR winning the inaugural title.
Russia
19 January — formation of the All-Russian Football Union (VRS) which is now the Russian Football Union; from 1935 to 1992 it is subsumed by the Football Federation of USSR.
Scotland
Scottish Football League – Rangers
Scottish Cup – Celtic 2–0 Clyde at Ibrox Park
Men's 100 metres
The first world record in the 100 metres for men is recognised by the International Amateur Athletics Federation, now known as the International Association of Athletics Federations (IAAF), after Donald Lippincott (USA) runs a time of 10.6 at Stockholm.
Men's 1500 metres
The first world record in the 1500 metres for men is recognised by the IAAF after Abel Kiviat (USA) runs a time of 3:55.8 at Cambridge, Massachusetts.
AFL Premiership
Essendon wins the 16th VFL Premiership: Essendon 5.17 (47) d South Melbourne 4.9 (33) at Melbourne Cricket Ground (MCG)
Bandy
Sweden
Championship final – IFK Uppsala 1–1 Djurgårdens IF (declared a tie; no replay played)
World Series
8–16 October — Boston Red Sox (AL) defeats New York Giants (NL) to win the 1912 World Series by 4 games to 3 with one tie
Events
20 April — Boston Red Sox open the new Fenway Park with a 7–6 11-inning win over New York Yankees before 27,000. Minutes later, the Detroit Tigers open the remodelled Navin Park (later named Tiger Stadium) with a 6–5 11-inning win over Cleveland Indians before 24,384.
Winnipeg Maroons win the Northern League championship
Events
22 February — Johnny Kilbane wins the World Featherweight Championship when he defeats Abe Attell over 20 rounds at Vernon, California. Attell has held the title since 1903; Kilbane will hold it until 1923.
28 November — Ad Wolgast loses his World Lightweight Championship to Willie Ritchie following a 16th round foul at Colma, California. Ritchie holds the title until 1914.
Lineal world champions
World Heavyweight Championship – Jack Johnson
World Light Heavyweight Championship – vacant
World Middleweight Championship – vacant
World Welterweight Championship – vacant
World Lightweight Championship – Ad Wolgast → Willie Ritchie
World Featherweight Championship – Abe Attell → Johnny Kilbane
World Bantamweight Championship – Johnny Coulon
Grey Cup
30 November — 4th Grey Cup – Hamilton Alerts 11–4 Toronto Argonauts
Events
A triangular Test tournament is played in England between England, Australia and South Africa. England wins with Australia second.
England
County Championship – Yorkshire
Minor Counties Championship – in abeyance
Most runs – David Denton 2127 @ 42.54 (HS 221)
Most wickets – Colin Blythe 178 @ 12.26 (BB 8–36)
Wisden Cricketers of the Year – no award
Australia
Sheffield Shield – New South Wales
Most runs – Wilfred Rhodes 1098 @ 54.90 (HS 179)
Most wickets – Frank Foster 62 @ 20.19 (BB 7–36)
India
Bombay Triangular – Parsees
New Zealand
Plunket Shield – Auckland
South Africa
Currie Cup – not contested
West Indies
Inter-Colonial Tournament – Barbados
Tour de France
Odile Defraye (Belgium) wins the 10th Tour de France
World Figure Skating Championships
World Men's Champion – Fritz Kachler (Austria)
World Women's Champion – Opika von Méray Horváth (Hungary)
World Pairs Champions – Phyllis Johnson / James H. Johnson (Great Britain)
Major tournaments
British Open – Ted Ray
US Open – John McDermott
Other tournaments
British Amateur – John Ball
US Amateur – Jerome Travers
England
Grand National – Jerry M
1,000 Guineas Stakes – Tagalie
2,000 Guineas Stakes – Sweeper II
Epsom Derby – Tagalie
Epsom Oaks – Mirska
St. Leger Stakes – Tracery
'Australia
Melbourne Cup – Piastre
Canada
Queen's Plate – Heresy
Ireland
Irish Grand National – Small Polly
Irish Derby Stakes – Civility
USA
Kentucky Derby – Worth
Preakness Stakes – Colonel Holloway
Belmont Stakes – not contested due to anti-betting legislation in New York State
Stanley Cup
Quebec Bulldogs wins the National Hockey Association (NHA) championship and the Stanley Cup. Quebec then defeats Moncton in a Cup challenge.
Events
March — Winnipeg Victorias repeats as Allan Cup winners
March — New Westminster Royals wins the inaugural Pacific Coast Hockey Association (PCHA) championship
December — Toronto NHA teams, the Blueshirts and Tecumsehs, join the NHA
Grand Prix racing
25/26 June — the 4th French Grand Prix, organised by the Automobile Club de France (ACF), is run at Dieppe over 1535.76 km (76.788 km x 20 laps). The winner is Georges Boillot of France driving a Peugeot L76 in 13:58:02.6. The race is retrospectively referred to as the XII Grand Prix de l´ACF.
Indianapolis 500
30 May — 2nd running of the Indianapolis 500 at the Indianapolis Motor Speedway is won by Joe Dawson and Don Herr (USA) driving a National car.
Monte Carlo Rally
2nd running is won by Jules Beutler driving a Berliet. This is the last running of the rally until its revival in 1924.
Vanderbilt Cup
2 October — 8th running of the Vanderbilt Cup at the new Wauwatosa automobile course near Milwaukee is won by Ralph DePalma (Italy) driving a Mercedes.
American Grand Prize
5 October — 4th running of the American Grand Prize takes place at Wauwatosa, near Milwaukee over 659.44 km (12.682 km x 52 laps) and is won by Caleb Bragg (USA) driving a FIAT in 5:59:27.44. David Bruce-Brown, the defending champion, is killed during practice for the event.
1912 Summer Olympics
The 1912 Summer Olympics takes place in Stockholm
First usage of electronic timing and public address systems
Sweden wins the most medals (65) and United States the most gold medals (25)
The Boat Race
1 April — Oxford wins the 69th Oxford and Cambridge Boat Race
England
Championship – Huddersfield
Challenge Cup final – Dewsbury 8–5 Oldham at Headingley Stadium, Leeds
Lancashire League Championship – Wigan
Yorkshire League Championship – Huddersfield
Lancashire Cup – Rochdale Hornets 12–5 Oldham
Yorkshire Cup – Huddersfield 22–10 Hull Kingston Rovers
International
The Ashes are won by Australia as they defeat Great Britain 33–8 in the 3rd Test of the 1911–12 Kangaroo tour of Great Britain at Villa Park before a crowd of 4,000.
Australia
NSW Premiership – Eastern Suburbs (outright winner)
Five Nations Championship
30th Five Nations Championship series is shared by England and Ireland
Speed Skating World Championships
Men's All-round Champion – Oscar Mathisen (Norway)
Australia
Australian Men's Singles Championship – James Cecil Parke (GC) defeats Alfred Beamish (GB) 3–6 6–3 1–6 6–1 7–5
England
Wimbledon Men's Singles Championship – Anthony Wilding (New Zealand) defeats Arthur Gore (GB) 6–4 6–4 4–6 6–4
Wimbledon Women's Singles Championship – Ethel Thomson Larcombe defeats Charlotte Cooper Sterry 6–3 6–1
France
French Men's Singles Championship – Max Decugis defeats André Gobert: details unknown
French Women's Singles Championship – Jeanne Matthey defeats Danet: details unknown
USA
American Men's Singles Championship – Maurice McLoughlin defeats Wallace Johnson 3–6 2–6 6–2 6–4 6–2
American Women's Singles Championship – Mary Browne defeats Eleonora Sears 6–4 6–2
Davis Cup
1912 International Lawn Tennis Challenge – British Isles 3–2 Australasia at Albert Ground (grass) Melbourne, Australia