1800 in sports

1800 in sports describes the year's events in world sport.

Boxing
Events
 * 7 January — Jack Bartholomew retained his English Championship title after drawing with Jem Belcher at St George's Fields in a contest lasting 51 rounds.
 * 15 May — Belcher, known as the "Napoleon of the Ring", defeated Bartholomew in 17 rounds on Finchley Common to claim the Championship of England. He held the title until 1805.

Cricket
Events England
 * Robert Robinson is believed to have been the first batsman to try to introduce leg guards but the experiment was unsuccessful.
 * Most runs – William Barton 226 (HS 51)
 * Most wickets – John Ward 47 (BB 7–?)

Horse racing
England
 * The Derby – Champion
 * The Oaks – Ephemera
 * St Leger Stakes – Champion