The British 100 metres athletics champions covers four competitions;
The AAA Championships were open to international athletes but those athletes were not considered the National Champion in this list if they won the relevant Championship, with the highest ranking British athlete given that title.
<section begin=twochamps /> Between 1977 and 1994, and again in 1997, two events effectively crowned national champions each year. The official UK Athletics Championships (not to be confused with the current championships, a rebranded British Athletics Championships) were specifically only open to British nationals and were organised by the national governing body. The AAA Championships continued, and due to their history, continued to be considered by both statisticians and athletes to be the more prestigious championships, with the exception of 1997 where the UK Championships were considered the principle championships for the only time. Winners at the UK Championships were nonetheless considered as having won a national title.
The UK Athletics Championships ceased to exist upon the insolvency of the governing body, the British Athletics Federation. The AAA championships continued until 2006, before they were replaced by the new British Athletics Championships. <section end="twochamps" />
The most successful sprinter in championships history is Linford Christie, who amassed nine in the AAA Championship continuity, in addition to six in the UK Championships. In total he won at least one version of the national title in eleven separate years. McDonald Bailey with seven titles and Dwain Chambers with eight, all in the single championship era, are the nearest challengers. In women's sprinting, Paula Dunn accumulated five wins in the AAA Championship and three in the UK Championship - and on three occasions completed AAA/UK Championships doubles - but Joice Maduaka, with six titles in the single championships era, is considered the most successful female 100 metre sprinter in championships history.
<nowiki>*</nowiki>nc= no championship held
+Lincoln Asquith finished fifth and was the leading British athlete.