Great Britain and Northern Ireland at the 2017 World Championships in Athletics

Great Britain and Northern Ireland competed at the 2017 IAAF World Championships in London, from 4–13 August 2017. It was the first time that the United Kingdom had hosted the World Championships. Mo Farah won the first medal for the host nation, also winning the first gold medal of the Championships (in the 10,000 metres).

Medallists
* – Indicates the athlete competed in preliminaries but not the final

Medal and performance targets
UK Sport targeted a minimum of 6 medals for London 2017, just slightly fewer than the set target of seven medals from the 2016 Summer Olympics Athletics events. The GB squad met this target on 13 August and finished with a total of 6 medals.

Men
* – Indicates the athlete competed in preliminaries but not the final
 * Track and road events


 * Field events


 * Combined events – Decathlon

Women
* – Indicates the athlete competed in preliminaries but not the final
 * Track and road events


 * Field events


 * Combined events – Heptathlon


 * Key
 * Q = Qualified for the next round
 * q = Qualified for the next round as a fastest loser or, in field events, by position without achieving the qualifying target
 * NR = National record
 * AR = Area/Continental record
 * PB = Personal best
 * SB = Season's best
 * N/A = Round not applicable for the event