This is a compilation of 27 United Kingdom Guinness records in 2004. You may want to take a look at our complete list of United Kingdom Guinness Records broken down by year.
| When | Record name | What | Who |
|---|---|---|---|
| 23 December 2004 | First row in an ocean double twice in one year | first | Michael Perrens |
| 29 November 2004 | Largest litter - dog | Tia | |
| 11 October 2004 | Largest collection of stickers of bowling clubs | 17455 total number | Cedric Brown |
| 11 October 2004 | Smallest dinosaur footprint | 1.78 centimetre(s) | Unknown |
| 09 October 2004 | Youngest female at No.1 on UK albums chart | Unknown | |
| 04 October 2004 | Youngest Moon rocks | 3,200,000,000 year(s) | Unknown |
| 04 September 2004 | Fastest 100 m abseil | Steve Truglia | |
| 28 August 2004 | Oldest manager in the English football (soccer) Premier League | Bobby Robson | |
| 15 August 2004 | Heaviest longbow draw weight | Mark Stretton | |
| 11 August 2004 | Longest surviving artificial heart transplant patient | Peter Houghton | |
| 08 August 2004 | Longest magic show - individual | 30/45 day(s):hour(s):minute(s) | Richard Smith |
| 03 August 2004 | Longest football tour | 1 total number | Lenton Griffins Football Club |
| 25 July 2004 | Most motor races in 24 hours | Fiona Leggate | |
| 21 June 2004 | Fastest time to fly a helicopter around the world eastbound | Simon Oliphant-Hope | |
| 17 May 2004 | Most yo-yo tricks in one minute | Hans Van Dan Elzen | |
| 15 May 2004 | First unbeaten football Premier League season | 38 first | Arsenal FC |
| 11 May 2004 | Longest theatrical run of a comedy | Newsrevue | |
| 05 May 2004 | First row across any ocean by a mother and daughter team | first | Sarah Kettle, Sally Kettle |
| 20 April 2004 | Highest human flight with a rocket belt | Eric Scott | |
| 20 February 2004 | Fastest run 5,000 metres (male) (indoors) | 12:49.60 minute(s):second(s) | Kenenisa Bekele |
| 12 February 2004 | Oldest insect | Rhyniognatha hirsti | |
| 02 February 2004 | Oldest biological molecules | 125-million-year-old Iguanodon | |
| 25 January 2004 | Longest marathon CPR session - team of two | Ray Edensor, Paul Gauntlett, Emma Parker, Mark Brookes | |
| 2004 | Most Consecutive Gold Medals won at Chelsea Flower Show | 60 total number | Hillier Nurseries |
| 2004 | Earliest land animal | 428,000,000 year(s) | Pneumodesmus newmani |
| 2004 | First billion-dollar author | first | J.K. Rowling |
| 2004 | Longest photographic career | 77 year(s) | GHF Atkins |