1912 in sports describes the year's events in world sport.
- The Football League – Blackburn Rovers 49 points, Everton 46, Newcastle United 44, Bolton Wanderers 43, The Wednesday 41, Aston Villa 41
- 20 April: FA Cup final – Barnsley 1–0 West Bromwich Albion at Bramall Lane, Sheffield (replay following 0–0 draw at Crystal Palace)
- Iceland's premier division, now known as Landsbankadeild, is established with KR winning the inaugural title.
- 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.
- 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
- 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
- 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
- A triangular Test tournament is played in England between England, Australia and South Africa. England wins with Australia second.
- 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
- Sheffield Shield – New South Wales
- Most runs – Wilfred Rhodes 1098 @ 54.90 (HS 179)
- Most wickets – Frank Foster 62 @ 20.19 (BB 7–36)
- Currie Cup – not contested
Tour de France
World Figure Skating Championships
- Grand National – Jerry M
- 1,000 Guineas Stakes – Tagalie
- 2,000 Guineas Stakes – Sweeper II
- The Derby – Tagalie
- The Oaks – Mirska
- St. Leger Stakes – Tracery
- Melbourne Cup – Piastre
- King's Plate – Heresy
- Quebec Bulldogs wins the National Hockey Association (NHA) championship and the Stanley Cup. Quebec then defeats Moncton in a Cup challenge.
1912 Summer Olympics
The Boat Race
- Championship – Huddersfield
- Challenge Cup final – Dewsbury 8–5 Oldham at Headingley Rugby Stadium, Leeds
- Lancashire League Championship – Wigan
- Yorkshire League Championship – Huddersfield
- Lancashire County Cup – Rochdale Hornets 12–5 Oldham
- Yorkshire County Cup – Huddersfield 22–10 Hull Kingston Rovers
- 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.
Five Nations Championship
Speed Skating World Championships
- Australian Men's Singles Championship – James Cecil Parke (GC) defeats Alfred Beamish (GB) 3–6 6–3 1–6 6–1 7–5
- 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 (GB) defeats Charlotte Cooper Sterry (GB) 6–3 6–1
- French Men's Singles Championship – Max Decugis (France) defeats André Gobert (France): details unknown
- French Women's Singles Championship – Jeanne Matthey (France) defeats Marie Danet (France): details unknown
- American Men's Singles Championship – Maurice McLoughlin (USA) defeats Wallace Johnson (USA) 3–6 2–6 6–2 6–4 6–2
- American Women's Singles Championship – Mary Browne (USA) defeats Eleonora Sears (USA) 6–4 6–2
- Trusdell, Brian (January 2014). Pelé : Soccer Star & Ambassador: Soccer Star & Ambassador. ABDO Publishing Company. p. 26. ISBN 978-1-62968-148-1.
- Woods, Sarah; McColl, Richard (September 2015). Colombia. Bradt Travel Guides. p. 296. ISBN 978-1-84162-921-6.
- "Scottish Cup Past Winners | Scottish Cup | Scottish FA". www.scottishfa.co.uk. Retrieved 5 February 2021.
- Cyber Boxing Zone
- "Cycling-Tour de France list of winners". Eurosport UK. 26 August 2020. Retrieved 18 February 2021.
- "Epsom Derby | History, Winners, & Facts | Britannica". www.britannica.com. Retrieved 2 January 2022.