The 2003 Houston City Championship was held March 9-11 at the Westlake Club in Houston. Winners and runners-up were:
| Skill Level | Winners | Runners-Up |
| 5.5 | Muhammad Sadiq | Guy Cowan |
| 5.0 | Eduardo Perez | David Bennett |
| 4.5 | Fernando Arrieta | Keith Huet |
| 4.0 | Mark Mathes | Vikram Kanodia |
| 3.5 | John Landers | Calum Macaulay |
| 3.0 | Stuart McGeoch | Jenz Arias |
| 2.5 | Bill Millman | Simon Osbeck |
| Skill Level | Winners | Runners-Up |
| 3.5 | Vanessa Calderon | Stacey Coppel |
| 3.0 | Katy Scruton | Pat Nichols |
| 2.5 | Ann Marchand | Amabelle Cowan |