This page lists the World Best Year Performance in the year 2003 in the men's decathlon. One of the main events during this season were the 2003 World Championships in Paris, France, where the competition started on Monday, August 26, 2003 and ended on Tuesday, August 27, 2003.
| Rank | Points | Athlete | Venue | Date | Note | |
|---|---|---|---|---|---|---|
| 1 | 8807 | Götzis, Austria | 2003-06-01 | |||
| 2 | 8784 | Palo Alto, United States | 2003-06-22 | |||
| 3 | 8482 | Palo Alto, United States | 2003-06-22 | |||
| 4 | 8374 | Paris, France | 2003-08-27 | |||
| 5 | 8281 | Tallinn, Estonia | 2003-07-06 | |||
| 6 | 8275 | Palo Alto, United States | 2003-06-22 | |||
| 7 | 8242 | Paris, France | 2003-08-27 | |||
| 8 | 8222 | Götzis, Austria | 2003-06-01 | |||
| 9 | 8219 | Talence, France | 2003-09-21 | |||
| 10 | 8203 | Tartu, Estonia | 2003-07-20 | |||
| 11 | 8198 | Paris, France | 2003-08-27 | |||
| 12 | 8196 | Daegu, South Korea | 2003-08-29 | |||
| 13 | 8126 | Paris, France | 2003-08-27 | |||
| 14 | 8122 | Daegu, South Korea | 2003-08-29 | |||
| 15 | 8072 | Arles, France | 2003-06-08 | |||
| 16 | 8061 | Sacramento, United States | 2003-06-12 | |||
| 17 | 8060 | Tallinn, Estonia | 2003-07-06 | |||
| 18 | 8020 | Paris, France | 2003-08-27 | |||
| 19 | 8019 | Götzis, Austria | 2003-06-01 | |||
| 20 | 8010 | Palo Alto, United States | 2003-06-22 | |||
| 21 | 8000 | Paris, France | 2003-08-27 | |||
| 22 | 7980 | Götzis, Austria | 2003-06-01 | |||
| 23 | 7964 | Arles, France | 2003-06-08 | |||
| 24 | 7958 | Götzis, Austria | 2003-06-01 | |||
| 25 | 7954 | Minsk, Belarus | 2003-05-23 |