Swimming at the 2003 World Aquatics Championships – Men's 200 metre individual medley

The Men's 200 Individual Medley event at the 10th FINA World Aquatics Championships swam 24–25 July 2003 in Barcelona, Spain. Preliminary and Semifinal heats swam July 24; the Final was July 25.

At the start of the event, the existing World (WR) and Championship (CR) records were both:
 * WR: 1:57.94 swum by Michael Phelps (USA) on June 29, 2003 in Santa Clara, USA
 * CR: 1:58.16 swum by Jani Sievinen (Finland) on September 11, 1994 in Rome, Italy