Great Britain, represented by the British Olympic Association (BOA), competed at the 2000 Summer Olympics in Sydney, Australia. British athletes have competed in every Summer Olympic Games. 310 competitors, 181 men and 129 women, took part in 179 events in 23 sports. These were the first Summer Olympics in which the team of selected athletes was officially known as Team GB in a highly successful attempt to unify all the competing athletes across all the sports and events and boost team morale. Going into the games following their exceptionally poor performance in Atlanta widespread expectations of the team were low.
The Sydney Games was at the time the best performance by Great Britain in the Summer Olympic Games since 1920, with British competitors winning a total of 28 medals, 11 of which were gold. This represented a vast improvement in performance over the previous Summer Olympics in 1996, in which Great Britain won only one gold medal and 15 in total, and was the first of five consecutive Summer Olympics in which Great Britain would not only dramatically increase its overall performance and expectations but also see them dramatically increase its overall Summer Olympics medal tally. This was also the first Summer Olympic Games where British competitors benefited from ã58.9m of National Lottery funding when it was introduced in 1997.
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The following Team GB competitors won multiple medals at the 2000 Olympic Games.
The three British archers had a combined record of 3-3.
<small>Qualification legend: FA=Gold medal final; FB=Bronze medal final</small>
Three fencers, two men and one woman, represented Great Britain in 2000.
Lisa Mason, Annika Reeder, Emma Williams, Sharna Murray, Kelly Hackman & Paula Thomas represented Great Britain. The Team placed 10th which was the highest placing attained by GBR Women's Artistic Gymnastics at an Olympic Games.
Head coach: Barry Dancer
Head coach: Chris Spice
<small>Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); FE=Final E (non-medal); FF=Final F (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; R=Repechage</small>
Great Britain competed in ten of the eleven Sailing events at the Sydney Olympics. They won three gold medals and two silver medals.
Qualifiers for the latter rounds (Q) of all events were decided on a time only basis, therefore positions shown are overall results versus competitors in all heats. <nowiki>*</nowiki> Competed in the heats only
Qualifiers for the latter rounds (Q) of all events were decided on a time only basis, therefore positions shown are overall results versus competitors in all heats.
The three British triathletes that finished the inaugural Olympic triathlon placed highly, with none lower than fifteenth place and two in the top ten. However, three more British athletes did not finish the competition.