A number of elections, both federal and local, took place in Mexico during 2003:
6 July 2003 edit
Federal Congress edit
- Chamber of Deputies – 500 federal deputies
Colima edit
- Governor, state congress, and mayors
- See: 2003 Colima state election
Nuevo León edit
- Governor, state congress, and mayors
- See: 2003 Nuevo León state election
Sonora edit
- Governor, state congress, and mayors
- See: 2003 Sonora state election
7 December 2003 edit
Colima edit
- Re-run of annulled gubernatorial race
- See: 2003 Colima state election