thumb|250px|right|[[Tommy Ryan was one of boxing's greatest champions]]
1900 in sports describes the year's events in world sport.
American football
College championship
- College football national championship – Yale Bulldogs
Professional Championships
- Western Pennsylvania championship – Homestead Library & Athletic Club
Association football
Australia
- The Tasmanian Soccer Association is founded
England
- The Football League – Aston Villa 50 points, Sheffield United 48, Sunderland 41, Wolves 39, Newcastle United 36, Derby County 36
- FA Cup final – Bury 4–0 Southampton at Crystal Palace, London.
Germany
- German Football Association (i.e., the Deutscher Fußball-Bund or DFB) founded in Leipzig by representatives of 86 clubs (28 January).
- FC Bayern Munich founded on 27 February as Schwabinger Bayern at a meeting in Munich's Gisela Restaurant by dissident players from a club called MTV 1879. The name was later changed to Bayern Roten (Reds).
Italy
- Lazio of Rome officially founded on January 9.
Olympic Games
- Football at the 1900 Summer Olympics:
- Upton Park FC (Great Britain)
- Club Française (France)
- Université de Bruxelles (Belgium)
Scotland
- Scottish Football League – Rangers
- Scottish Cup final – Celtic 4–3 Queen's Park at Ibrox Park
Uruguay
- Formation of the Uruguayan Football Association (Asociación Uruguaya de Fútbol or AUF)
Athletics
- USA Outdoor Track and Field Championships
- Jack Caffery wins the fourth running of the Boston Marathon
Australian rules football
VFL Premiership
- Melbourne Football Club wins the 4th VFL Premiership: Melbourne 4.10 (34) d Fitzroy 3.12 (30) at East Melbourne
Baseball
National championship
- National League championship – Brooklyn Superbas
Events
- 1900 – Six cities, Boston, Detroit, Milwaukee, Baltimore, Chicago and St. Louis, agree to form baseball's American League.
- The National League contracts from twelve to eight clubs in a circuit of eight cities that will persist through 1952.
- The Western League takes the name "American League" and moves teams into Chicago and Cleveland. The Chicago White Stockings win the pennant in this one season under the new name and the old minor league status.
Boxing
Lineal world champions
- World Heavyweight Championship – James J. Jeffries
- World Middleweight Championship – Tommy Ryan
- World Welterweight Championship – "Mysterious" Billy Smith → William "Matty" Matthews → Eddie Connolly → James "Rube" Ferns → William "Matty" Matthews
- World Lightweight Championship – Frank Erne
- World Featherweight Championship – George Dixon → "Terrible" Terry McGovern
- World Bantamweight Championship – title vacant
Events
- 11 May. After 23 rounds, James J. Jeffries knocks out James J. Corbett to retain the world heavyweight championship.
Canadian Football
- The ORFU bans CIRFU players from its league.
- Ontario Rugby Football Union - Ottawa Rough Riders
- Quebec Rugby Football Union - Brockville
- Manitoba Rugby Football Union - Winnipeg
- Intercollegiate Rugby Football Union - McGill
- Dominion Championship - Ottawa Rough Riders defeat Brockville 17-10
Cricket
thumb|250px|right|[[Victor Trumper led the Australian batting averages]]
Events
- Cricket is suspended in South Africa for the next three seasons on account of the Boer War.
- Yorkshire completes the County Championship season unbeaten, the first time this has happened since the start of the official championship in 1890.
- The Minor Counties Championship ends in a three-way tie between three future first-class clubs.
England
- County Championship – Yorkshire
- Minor Counties Championship – Durham, Glamorgan and Northamptonshire share the title
- Most runs – K S Ranjitsinhji 3065 @ 87.57 (HS 275)
- Most wickets – Wilfred Rhodes 261 @ 13.81 (BB 8–23)
- Wisden Cricketers of the Year – R. E. Foster, Schofield Haigh, George Herbert Hirst, Tom Taylor, John Tunnicliffe
Australia
- Sheffield Shield – New South Wales
- Most runs – Victor Trumper 721 @ 72.10 (HS 208)
- Most wickets – Monty Noble 37 @ 20.64 (BB 6–91)
India
- Bombay Presidency – Europeans shared with Parsees
South Africa
- Currie Cup – not contested
West Indies
- Inter-Colonial Tournament – Barbados
Figure skating
World Figure Skating Championships
- World Men's Champion – Gustav Hügel (Austria)
Golf
thumb|175px|right|[[Harry Vardon won his only US Open title in 1900]]
Major tournaments
- British Open – John Henry Taylor
- U.S. Open – Harry Vardon
Other tournaments
- British Amateur – Harold Hilton
- British Ladies Amateur Golf Championship – Rhona Adair
- US Amateur – Walter Travis
- US Women's Amateur – Frances C. Griscom
- Canadian Amateur Championship – George Lyon
- Olympic Games (Men) – Charles Sands
- Olympic Games (Women) – Margaret Ives Abbott
Horse racing
thumb|350px|right|[[Diamond Jubilee (horse)|Diamond Jubilee won the Triple Crown in England]]
England
- Grand National – Ambush II
- 1,000 Guineas Stakes – Winifreda
- 2,000 Guineas Stakes – Diamond Jubilee
- The Derby – Diamond Jubilee
- The Oaks – La Roche
- St. Leger Stakes – Diamond Jubilee
Australia
- Melbourne Cup – Clean Sweep
Canada
- Queen's Plate – Dalmoor
Ireland
- Irish Grand National – Mavis of Meath
- Irish Derby Stakes – Gallinaria
USA
- Kentucky Derby – Lieut. Gibson
- Preakness Stakes – Jean Bereaud
- Belmont Stakes – Ildrim
Ice hockey
Stanley Cup
- 12–16 February — Montreal Shamrocks successfully defends the Stanley Cup, defeating Winnipeg Victorias in a best–of–three series 2–1.
- 5–7 March — Montreal Shamrocks defeats Halifax Crescents in a Cup challenge best–of–three series 2–0.
Other events
- 10 March — Montreal Shamrocks wins the Canadian Amateur Hockey League (CAHL) championship for the second successive season with a regular season record of 7–1.
Motor racing
Gordon Bennett Cup
- James Gordon Bennett, Jr., owner of the New York Herald newspaper and the International Herald Tribune, establishes the Gordon Bennett Cup. He hopes that the creation of an international event will drive automobile manufacturers to improve their cars. Each country is allowed to enter up to three cars, which must be fully built in the country that they represent and entered by that country's automotive governing body.
Olympic Games
1900 Summer Olympics
- The 1900 Summer Olympics takes place in Paris but the Olympic status of the games is underplayed and many competitors do not realise that they have participated in the modern Olympics.
- Women take part in the modern Olympics for the first time. The first sportswomen to compete in the games are Mme. Brohy and Mlle. Ohnier of France in croquet. The first female champion is Charlotte Cooper of Great Britain in tennis.
- France wins the most medals (100), and the most gold medals (25).
Rowing
The Boat Race
- 31 March — Cambridge wins the 57th Oxford and Cambridge Boat Race
Rugby league
England
- Championship – not contested
- Challenge Cup final – Swinton 16–8 Salford at Fallowfield Stadium, Manchester
- Lancashire League Championship – Runcorn
- Yorkshire League Championship – Bradford FC
Rugby union
Home Nations Championship
- 18th Home Nations Championship series is won by Wales
Speed skating
Speed Skating World Championships
- Men's All-round Champion – Edvard Engelsaas (Norway)
Tennis
Events
- 9 February — Davis Cup competition is established, the inaugural competition being called the International Lawn Tennis Challenge and involving only Great Britain and the USA.
- 15 August — Dwight F. Davis and Holcombe Ward win the first Davis Cup over Englishmen E.D.Black and H.R.Barett. (3-0, when the last match was halted by rain after Davis won the first set 9–7)
England
- Wimbledon Men's Singles Championship – Reginald Doherty (GB) defeats Sydney Smith (GB) 6–8 6–3 6–1 6–2
- Wimbledon Women's Singles Championship – Blanche Bingley Hillyard (GB) defeats Charlotte Cooper-Sterry (GB) 4–6 6–4 6–4
France
- French Men's Singles Championship – Paul Aymé (France) defeats André Prévost (France): details unknown
- French Women's Singles Championship – Hélène Prévost (France) wins: details unknown
USA
- American Men's Singles Championship – Malcolm Whitman (USA) defeats William Larned (USA) 6–4 1–6 6–2 6–2
- American Women's Singles Championship – Myrtle McAteer (USA) defeats Edith Parker (USA) 6–2 6–2 6–0
Davis Cup
- 1900 International Lawn Tennis Challenge – 3–0 at Longwood Cricket Club (grass) Boston, United States