The athletics competition at the 2003 Pan American Games was held in Santo Domingo, Dominican Republic, from Tuesday, August 5, to Saturday, August 9, 2003. The competition comprised track and field events plus marathon races and three racewalking events, with a total of 46 contests taking place.
The Swimming competition at the 14th Pan American Games was held August 12–18, 2003 in Santo Domingo, Dominican Republic. The competition was held in the outdoor (50m) pool of the Juan Pablo Duarte Olympic Center. It featured 32 long course (50m) events.
The Men's 1500m Freestyle event at the 2003 Pan American Games took place on August 17, 2003.
The Men's 4 × 100 m Medley Relay event at the 2003 Pan American Games took place on August 17, 2003.
The Women's 50m Freestyle event at the 2003 Pan American Games took place on August 17, 2003.
The Women's 200m Butterfly event at the 2003 Pan American Games took place on August 17, 2003.
The Women's 200m Backstroke event at the 2003 Pan American Games took place on August 17, 2003.
The Men's 100m Freestyle event at the 2003 Pan American Games took place on August 14, 2003.
The Men's 200m Backstroke event at the 2003 Pan American Games took place on August 14, 2003. Brazil's Rogério Romero (33) added another gold in the 200 backstroke in 1:59.92. Romero first won this event in 1991 and a silver in 1995.
The Women's 400m Freestyle event at the 2003 Pan American Games took place on August 14, 2003.
The Women's 4x100m Freestyle Relay event at the 2003 Pan American Games took place on August 14, 2003.
The Men's 400 meter freestyle event at the 2003 Pan American Games took place on August 15, 2003.
The Men's 4 × 100 m Freestyle Relay event at the 2003 Pan American Games took place on August 15, 2003. Brazil won the men's 4 × 100 free relay in 3:18.66, shy of their Games record from four years ago. Venezuela was second and Canada third. The USA was disqualified when second swimmer Jayme Cramer left early.
The Women's 100m Butterfly event at the 2003 Pan American Games took place on August 15, 2003.
The Women's 100m Breaststroke event at the 2003 Pan American Games took place on August 15, 2003.
The Men's 100m Backstroke event at the 2003 Pan American Games took place on August 16, 2003.
The Men's 200m Butterfly event at the 2003 Pan American Games took place on August 16, 2003.
The Women's 200m Individual Medley event at the 2003 Pan American Games took place on August 16, 2003.
The Women's 800m Freestyle event at the 2003 Pan American Games took place on August 16, 2003.
The Women's 4x100m Medley Relay event at the 2003 Pan American Games took place on August 16, 2003.
