1891 in sports describes the year's events in world sport.
- Kansas defeats Missouri in the first Border War game 22-10 beginning one of the oldest and most fierce college football rivalries.
- Argentine Primera Division founded
- Club Brugge KV founded
- The Football League – Everton 29 points, Preston North End 27, Notts County 26, Wolves 26, Bolton Wanderers 25, Blackburn Rovers 24
- FA Cup final – Blackburn Rovers 3–1 Notts County at The Oval
- The Football League expands from twelve to fourteen teams for the 1891–92 season: Stoke FC, having been expelled in 1890, is restored; Darwen is elected.
- The Scottish Football League's inaugural season is completed with a shared title
- Scottish Football League – Dumbarton and Rangers: title shared
- Scottish Cup final – Heart of Midlothian 1–0 Dumbarton at Hampden Park
- 28 September — foundation of the Central Uruguay Railway Cricket Club (CURCC) by British railway workers in Montevideo; it later becomes C.A. Peñarol
- National League v. American Association – series not held
- The National League winners are the Boston Beaneaters who decline to play against the American Association winners, the Boston Reds
- The American Association folds after the season ends
- James Naismith of Springfield, Massachusetts invents basketball
- 14 January — Bob Fitzsimmons knocks out Jack Nonpareil Dempsey in the 13th round at New Orleans to win the Middleweight Championship of the World. It is the first of three world titles that Fitzsimmons will hold during his career.
Lineal world champions
- Inaugural Inter-Colonial Tournament takes place in the West Indies involving Barbados, British Guiana and Trinidad & Tobago.
- County Championship – Surrey
- Most runs – William Gunn 1336 @ 41.75 (HS 169)
- Most wickets – George Lohmann 177 @ 11.66 (BB 7–20)
- Wisden Five Great Bowlers – William Attewell, J T Hearne, Frederick Martin, Arthur Mold, John Sharpe
- Most runs – George Giffen 275 runs @ 91.66 (HS 237)
- Most wickets – Jim Phillips 25 wickets @ 10.00 (BB 7–20)
- Grand National – Come Away
- 1,000 Guineas Stakes – Mimi
- 2,000 Guineas Stakes – Common
- The Derby – Common
- The Oaks – Mimi
- St. Leger Stakes – Common
- Melbourne Cup – Malvolio
- Queen's Plate – Victorious
- Irish Grand National – Old Tom
- Irish Derby Stakes – Narraghmore
- Kentucky Derby – Kingman
- Preakness Stakes – not run
- Belmont Stakes – Foxford
- 5 March — the Montreal Hockey Club defeats the Montreal Crescents 8–2 in a challenge to retain the 1891 AHAC season title.
- 7 March — the Ottawa Hockey Club defeats the Toronto St. George's 5–0 to win the inaugural Ontario Hockey Association championship.
- Djurgårdens IF Hockey was founded in Stockholm
The Boat Race
- 21 March — Oxford wins the 48th Oxford and Cambridge Boat Race
Home Nations Championship
- The 9th series is won by Scotland with a 100% record against England, Ireland and Wales.
- The 1891 British Lions tour to South Africa is the first British Isles tour of South Africa and only the second overseas tour conducted by a joint British team. Between 9 July and 7 September, the team plays 20 games, including three Tests against the South Africa national rugby union team. The British Isles wins all 20 matches including the three Tests. Although not named as such at the time, the tour is retrospectively recognised as a British Lions tour.
- Inaugural French championship is held as the Championat de France International de Tennis. Initially, only the men's singles is contested; the women's singles will begin in 1897. Until 1924, the tournament is open only to tennis players who are licensed in France but, ironically, the inaugural tournament is won by an Englishman, H Briggs, who defeats French player P Baigneres in the final. Briggs is a British resident living in Paris.
- Wimbledon Men's Singles Championship – Wilfred Baddeley (GB) defeats Joshua Pim (Ireland) 6–4 1–6 7–5 6–0
- Wimbledon Women's Singles Championship – Lottie Dod (GB) defeats Blanche Bingley Hillyard (GB) 6–2 6–1
- French Men's Singles Championship – H. Briggs (GB) defeats P. Baigneres (France) 6–3 6–2
- American Men's Singles Championship – Oliver Campbell (USA) defeats Clarence Hobart (USA) 2–6 7–5 7–9 6–1 6–2
- American Women's Singles Championship – Mabel Cahill (GB) defeats Ellen Roosevelt (USA) 6–4 6–1 4–6 6–3
- ^ Gupta, Shantanu; Sharma, Nikhil (4 February 2019). India's Football Dream. SAGE Publications India. p. 29. ISBN 978-93-5328-306-3.
- ^ "Club facts: Club Brugge". UEFA.com. 1 July 2019. Retrieved 5 February 2021.
- ^ "Scottish Cup Past Winners | Scottish Cup | Scottish FA". www.scottishfa.co.uk. Retrieved 5 February 2021.
- ^ Cyber Boxing Zone – Bob Fitzsimmons. Retrieved on 14 November 2009.
- ^ "Cyber Boxing Zone". Archived from the original on 2009-06-14. Retrieved 2009-06-20.
- ^ "Bobby Beasley: Quixotic jockey and trainer". The Independent. 23 October 2011. Archived from the original on 2022-05-01. Retrieved 5 February 2021.
- ^ "Epsom Derby | History, Winners, & Facts | Britannica". www.britannica.com. Retrieved 29 December 2021.
- ^ "Stockholm history filled with stars, passionate fans". NHL.com. Retrieved 15 February 2021.