The following tables are an overview of all current national records in the marathon, as compiled by World Athletics[1] and other authoritative sources of road racing statistics.
[10] Although World Athletics notes only the fastest performance under the UK umbrella, these associations each compile a list of national records in track and field.
For example, Athletics Weekly's list includes countries of England, Scotland, Wales, and Northern Ireland, as well as the Crown Dependencies of Guernsey, the Isle of Man, and Jersey which are technically not part of the United Kingdom.
Another important reference source is the 2018 edition of NATIONAL ATHLETICS RECORDS (NAR) for all countries in the world by Winfried Kramer with the assistance of Heinrich Hubbeling, Yves Pinaud and Steffan Stube.
Several national records were run on a date when an athlete represented a country currently no longer in existence such as the Union of Soviet Socialist Republics, Czechoslovakia and Yugoslavia.