This is a compilation of 58 United States Guinness records in 2003. You may want to take a look at our complete list of United States Guinness Records broken down by year.
| When | Record name | What | Who |
|---|---|---|---|
| 28 November 2003 | Oldest NBA player to achieve a triple-double | 40, 127 year(s):day(s) | Karl Malone |
| 19 November 2003 | Most alkaline-resistant lifeform | as yet unnamed bacteria | |
| 17 November 2003 | Most sequences completed in a game of Simon | 14 total number | Joel Berger |
| 13 November 2003 | Largest collection of commemorative church plates | 1206 total number | Tom and Barbara Southwell, Tom and Barbara Southwell |
| 02 November 2003 | Fastest time to run the New York Marathon (female) | 2/22/31 hour(s):minute(s):second(s) | Margaret Okayo |
| November 2003 | Most expensive sandwich sold at auction online | 28000 US dollar(s) | Virgin Mary |
| 01 November 2003 | Longest ears on a rabbit | 79 centimetre(s) | Nipper's Geronimo |
| 21 September 2003 | Fastest time to play a concert in each of the 50 US States | Adam Brodsky | |
| 12 September 2003 | Lowest manmade temperature | 450*10^-12 degree(s) Kelvin | Aaron Leanhardt |
| 31 August 2003 | Largest parade of Auburn, Cord and Duesenberg cars | 485 total number | Auburn Cord Duesenberg Club |
| 17 August 2003 | Tallest unicycle skipping | 2.79 metre(s) | Chaz Marquette |
| 17 August 2003 | Oldest team to win a pro beach volleyball title (male) | Karch Kiraly, Brent Doble | |
| 13 August 2003 | Highest suspension straitjacket escape | 2194.5 metre(s) | Scott Hammell |
| 12 August 2003 | Oldest convicted bank robber | J.L. Hunter Rountree | |
| 07 August 2003 | Most expensive toy soldier sold at auction | 200000 UK pound(s) sterling | 1963 prototype G.I. Joe |
| August 2003 | Most expensive kiss sold at auction | 50000 US dollar(s) | Joni Rimm |
| August 2003 | Smallest animal used in detecting land mines | 12 millimetre(s) | Honeybee |
| 30 July 2003 | Oldest full-time secretary | 1909/10/05 year(s):day(s) | Verna Theus Davis Willmon |
| 29 July 2003 | Heaviest birth - triplets (current) | 10.33 kilogram(s) | Michelle Lee Wilson |
| 22 July 2003 | Heaviest weight lifted in one hour bench press | Eamonn Keane | |
| 10 July 2003 | Fastest paddleboard (SUP) crossing of the Florida Straits (women's team) | 25/44 day(s):hour(s):minute(s) | Hayley Bateup, Janna Worlock, Nicola Mocke, Aline Paterson |
| 06 July 2003 | Most tennis balls held in the mouth - dog | Augie | |
| 06 July 2003 | Most drink cans collected (8 hours) | 152800 kilogram(s) | Habitat for Humanity of Evansville |
| 03 July 2003 | Largest collection of thermometers | 4580 total number | Richard T Porter |
| 28 June 2003 | Farthest distance skipping on a rolling globe | Katya Davidson | |
| 28 May 2003 | Fastest time to row the length of the Mississippi River by a team | 18/4/51 day(s):hour(s):minute(s) | Bob Bradford & Clark Eid |
| 17 May 2003 | Largest biscuit / cookie | 754 square metre(s) | Immaculate Baking Company |
| 15 May 2003 | Longest career as a police officer | 61 year(s):day(s) | Detective Lieutenant Andrew F. Anewenter |
| 06 May 2003 | Largest horn circumference - steer (ever) | 95.25 centimetre(s) | Lurch |
| May 2003 | First flashmob | first | Unknown |
| 30 April 2003 | Fastest railed vehicle (rocket sled) | 2886 metre(s) per second | Holloman High Speed Test Track |
| 25 April 2003 | Largest Russian nesting doll (matryoshka) | 51 centimetre(s) | Youlia Bereznitskiaia |
| 15 April 2003 | Most fatal incidents in one day survived by a dog | Dosha | |
| 03 April 2003 | Most continuous upright spins - Ice skating | 115 total number | Lucinda Ruh |
| 23 March 2003 | Most Oscar nominations without winning | 20 total number | Kevin O'Connell |
| 18 March 2003 | First clamshell laptop | first | Unknown |
| 12 March 2003 | Fastest digital signal processor | Unknown | |
| 11 March 2003 | Most skips Texas style consecutively | Andrew Rotz | |
| 02 March 2003 | Most heavyweight titles won by a former middleweight | Roy Jones Jnr, Robert James `Bob' Fitzsimmons | |
| March 2003 | First download-only hit single | first | Fleetwood Mac |
| 27 February 2003 | Largest lens | Unknown | |
| 20 February 2003 | Most expensive horse draught horse | 112500 US dollar(s) | McIlraths Captain Jim |
| 17 February 2003 | First telephone call | first | Unknown |
| 14 February 2003 | Heaviest hoverable fighter plane | Joint Strike Fighter F-35 | |
| 06 February 2003 | Longest laser ranging experiment | The McDonald Laser Ranging Station | |
| 28 January 2003 | Longest non-stop ocean voyage by a raft | 136 day(s) | Raft Transpacific Expedition |
| 27 January 2003 | Largest vacuum chamber | Space Power Facility | |
| 25 January 2003 | Largest trick roping loop by a female | 23.21 metre(s) | Kimberly Mink |
| 08 January 2003 | Largest kugel | Science Museum of Virginia | |
| 02 January 2003 | Largest tuning fork | Po Shu Wang | |
| 01 January 2003 | Longest marathon playing a trading card game | 154/128 hour(s):minute(s):second(s) | William Stone, Bryan Erwin, Chris Groetzinger |
| 2003 | Most ArenaBowl victories | 5 total number | Tampa Bay Storm |
| 2003 | Oldest heart bypass surgery patient | Five patients more than 100 years of age | |
| 2003 | Longest running TV quiz show | It's Academic | |
| 2003 | First fictional character nominated for an Oscar | first | Donald Kaufman |
| 2003 | Oldest kinkajou ever in captivity | Sugar Bear | |
| 2003 | Most Oscar nominations - actor | 12 total number | Jack Nicholson |
| 2003 | Most shutouts in an NHL ice hockey playoff season by a goaltender | Martin Brodeur |