| Year: | 2003 |
| Tour: | European Seniors Tour |
| Regular Season: | – |
| No Of Events: | 22 |
| Most Wins: | Carl Mason (4) |
| Honor1: | Order of Merit |
| Honoree1: | Carl Mason |
| Honor2: | Rookie of the Year |
| Honoree2: | Carl Mason |
| Prevseason: | 2002 |
| Nextseason: | 2004 |
The 2003 European Seniors Tour was the 12th season of the European Seniors Tour, the main professional golf tour in Europe for men aged 50 and over.
The following table lists official events during the 2003 season.[1]
| Date | Tournament | Host country | Purse (€) | Winner | Notes | |
|---|---|---|---|---|---|---|
| 23 Mar | Jamaica | US$250,000 |  Ray Carrasco (2) | |||
| 29 Mar | Barbados | US$200,000 |  Terry Gale (3) | |||
| 5 Apr | Trinidad and Tobago | US$200,000 | Terry Gale (4) | |||
| 18 May | Ireland | 330,000 | Noel Ratcliffe (7) | |||
| 25 May | Belgium | 130,000 | Hank Woodrome (1) | |||
| 8 Jun | Senior PGA Championship | United States | US$2,000,000 | John Jacobs (n/a) | Senior major championship | |
| 15 Jun | Jersey | £100,000 | Malcolm Gregson (4) | |||
| 22 Jun | England | £150,000 | Jerry Bruner (2) | |||
| 29 Jun | U.S. Senior Open | United States | US$2,600,000 | Bruce Lietzke (n/a) | Senior major championship | |
| 6 Jul | Wales | £500,000 | Bill Longmuir (1) | |||
| 13 Jul | England | £125,000 | Carl Mason (1) | |||
| 27 Jul | Senior British Open | Scotland | US$1,600,000 | Tom Watson (n/a) | Senior major championship | |
| 3 Aug | England | £200,000 | Bill Longmuir (2) | |||
| 10 Aug | Switzerland | 160,000 |  Horacio Carbonetti (1) | |||
| 17 Aug | England | £225,000 | John Chillas (1) | |||
| 24 Aug | England | £150,000 | Mike Miller (1) | New tournament | ||
| 31 Aug | Scotland | £150,000 | Terry Gale (5) | |||
| 7 Sep | England | £225,000 | Paul Leonard (2) | |||
| 20 Sep | Spain | £100,000 | Carl Mason (2) | |||
| 28 Sep | Spain | £150,000 | Carl Mason (3) | New tournament | ||
| 4 Oct | Tunisia | £125,000 | David Good (2) | |||
| 12 Oct | Portugal | 240,000 | Carl Mason (4) | Tour Championship |
The following events were sanctioned by the European Seniors Tour, but did not carry official money, nor were wins official.
The Order of Merit was based on prize money won during the season, calculated in Euros.[2]
| Position | Player | Prize money (€) | |
|---|---|---|---|
| 1 | 350,242 | ||
| 2 | 253,667 | ||
| 3 | 195,727 | ||
| 4 | 190,003 | ||
| 5 | 146,604 |