The 1970 FA Cup final was contested by Chelsea and Leeds United. The match took place on 11 April 1970 at Wembley Stadium and ended 2–2, making it the first FA Cup final to require a replay since 1912. The replay was staged at Old Trafford and played on 29 April; after four hours of fiercely contested football, Chelsea eventually won 2–1. To date, this is the last time both the final and replay were scheduled to be played in April; all subsequent FA Cup final ties have been scheduled to be played in May, with only the 2020 FA Cup final (played in August) and the 2023 FA Cup final (played in June) played later due to the COVID-19 pandemic and the 2022 FIFA World Cup respectively.

Leeds and Chelsea were two of England's top teams that season, having finished 2nd and 3rd respectively in the First Division. The match marked a clash of footballing contrasts: Chelsea were regarded as "flamboyant" southerners, whereas Leeds were seen as uncompromising northerners. Neither had won the FA Cup before, though both had recently been runners-up, Leeds in 1965 and Chelsea in 1967.

The replay was the only time between 1923 and 2000 that an FA Cup final was played at a stadium other than Wembley. The replay attracted a British television audience of more than 28 million, the second highest UK audience for a sports broadcast (behind the 1966 World Cup final), and the sixth highest audience for any UK broadcast. It has been ranked among the greatest ever FA Cup finals, and named as the "most brutal game" in the history of English football, due to the large number of fouls committed by both teams.

The match was the first FA Cup final to be reported on by a woman, as Mary Raine provided a match report for Radio 4's Six O'Clock News.

Home teams listed first.

The final at Wembley was scheduled for 11 April, around a month earlier than was typical for FA Cup finals, due to the FA's wish for the England national team, who were world champions and were defending their trophy in Mexico, to have time to acquaint themselves to the Mexican climate. The poor state of the pitch is sometimes erroneously explained by the Horse of the Year Show being held there a week before. The Horse of the Year Show was held at Wembley Arena. The International Horse Show was held at the stadium the previous July, but the pitch was relaid later in the year.

In a game where Leeds were generally seen to have had the best of the play – with winger Eddie Gray, named man of the match, in particular giving David Webb a torrid time – the Yorkshiremen took the lead after 20 minutes when Jack Charlton's downward header from a corner did not bounce in the muddy pitch, defending Chelsea player Eddie McCreadie mis-timed his attempted clearance and the ball rolled over the line. Towards the end of the first half, Chelsea's Peter Houseman drove a low shot from 20 yards (18 m), which rolled under goalkeeper Gary Sprake's body for the equaliser. Leeds appeared to have secured the game six minutes from full-time when an Allan Clarke header hit the post and Mick Jones reacted first to put the ball into the net, but two minutes later Ian Hutchinson headed in the equaliser from John Hollins' cross. There were no more goals scored during the 30-minute extra time and the two squads took a joint lap of honour.

The Wembley pitch, after the game, was in such appalling condition, as it was for much of the game itself, that the Football Association decided to stage the replay at Manchester's Old Trafford stadium.^{[citation needed]}