List of British champions in 800 metres

British athletics champions
	60 metres	100 metres
	200 metres	400 metres
	800 metres	1500 metres
	3000 metres	5000 metres
	10,000 metres	10 miles
	marathon	steeplechase
	100/110 hurdles	200 hurdles
	400 hurdles	3,000 walk
	5,000 walk	10,000 walk
	decathlon/heptathlon	discus
	hammer	high jump
	javelin	long jump
	pole vault	shot put
	triple jump
v t e

The list of British 800 metres athletics champions covers four competitions;

• the Amateur Athletic Club Championships (1866-1879)
• the AAA Championships (1880-2006),
• the UK Athletics Championships which existed from 1977 until 1993, with a single further event in 1997, and ran concurrently with the AAA Championships.^[1]
• the current British Athletics Championships which was founded in 2007,^[2]

The AAA Championships were open to international athletes but a guest international was not considered the National Champion in this list if they won the relevant Championship, that title going to the highest placed British athlete in the event. Despite this, the AAA Championships were regarded as more prestigious than the British-only UK Championships event for most of the latter's existence, although both were recognised as national championships. The UK Championships were ended in 1997, while the AAA Championships were supplanted by the British Athletics Championships in 2007. While the AAA Championships continue, they are no longer regarded as crowning a British champion.

• NBA = No British athlete in final
• nc = not contested
• + = UK Championships