This page lists the World Best Year Performance in the year 2003 in both the men's and the women's hammer throw. The main event during this season were the 2003 World Athletics Championships in Paris, France, where the final of the men's competition was held on Tuesday August 25, 2003. The women had their final three days later, on Thursday August 28, 2003.
| Rank | Mark | Athlete | Venue | Date | Note | |
|---|---|---|---|---|---|---|
| 1 | 84.86 m | 2003-06-29 | AR | |||
| 2 | 84.32 m | 2003-08-08 | PB | |||
| 3 | 84.19 m | Szombathely, Hungary | 2003-08-10 | NR | ||
| 4 | 82.28 m | 2003-07-10 | PB | |||
| 5 | 81.81 m | 2003-06-29 | NR | |||
| 6 | 81.74 m | 2003-07-04 | ||||
| 7 | 81.35 m | 2003-07-11 | ||||
| 2003-07-13 | PB | |||||
| 9 | 81.21 m | 2003-08-03 | ||||
| 10 | 80.89 m | 2003-07-13 | PB | |||
| 11 | 80.83 m | 2003-08-01 | ||||
| 12 | 80.67 m | Zalaegerszeg, Hungary | 2003-06-14 | PB | ||
| 13 | 80.51 m | Löffingen, Germany | 2003-09-17 | NR | ||
| 14 | 80.44 m | Saint-Étienne, France | 2003-05-10 | |||
| 15 | 80.20 m | 2003-08-09 | ||||
| 16 | 80.13 m | 2003-07-10 | ||||
| 17 | 79.90 m | 2003-08-08 | ||||
| 18 | 79.62 m | 2003-07-26 | ||||
| 19 | 79.52 m | 2003-08-01 | ||||
| 20 | 79.35 m | 2003-05-11 | ||||
| 21 | 79.20 m | 2003-02-22 | ||||
| 22 | 79.07 m | Chelles, France | 2003-10-01 | |||
| 23 | 78.89 m | Moscow, Russia | 2003-07-26 | |||
| 24 | 78.83 m | Lahti, Finland | 2003-07-02 | PB | ||
| 25 | 78.81 m | Szombathely, Hungary | 2003-09-13 |
| Rank | Mark | Athlete | Venue | Date | Note | |
|---|---|---|---|---|---|---|
| 1 | 75.14 m | 2003-07-17 | PB | |||
| 2 | 74.98 m | 2003-08-09 | ||||
| 3 | 74.50 m | Villeneuve d'Ascq, France | 2003-06-15 | PB | ||
| 4 | 72.96 m | Koncha-Zaspa, Ukraine | 2003-05-23 | PB | ||
| 5 | 72.03 m | 2003-09-12 | PB | |||
| 6 | 71.99 m | Firenze, Italy | 2003-06-22 | |||
| 7 | 71.93 m | Fränkisch-Crumbach, Germany | 2003-06-08 | PB | ||
| 8 | 71.38 m | 2003-07-20 | ||||
| 9 | 71.33 m | Walnut, United States | 2003-04-19 | |||
| 10 | 71.12 m | 2003-02-06 | AR | |||
| 11 | 70.69 m | 2003-05-28 | PB | |||
| 12 | 70.67 m | 2003-04-05 | PB | |||
| 13 | 70.60 m | 2003-04-05 | PB | |||
| 14 | 70.50 m | Marietta, Georgia, United States | 2003-12-28 | PB | ||
| 15 | 70.43 m | 2003-07-05 | PB | |||
| 16 | 70.42 m | 2003-06-21 | PB | |||
| 17 | 70.02 m | 2003-04-30 | ||||
| 18 | 69.98 m | 2003-08-09 | NR | |||
| 19 | 69.79 m | Sacramento, United States | 2003-06-14 | PB | ||
| 20 | 69.72 m | 2003-06-21 | PB | |||
| 21 | 69.59 m | 2003-08-09 | PB | |||
| 22 | 69.33 m | Schönau, Germany | 2003-06-21 | PB | ||
| 23 | 69.24 m | Burnaby, Canada | 2003-06-08 | NR | ||
| 24 | 69.17 m | 2003-05-24 | PB | |||
| 25 | 69.05 m | 2003-08-26 | PB |