2002–03 CA Osasuna season

The 2002–03 CA Osasuna season is the 82nd season in the club's history.in the La Liga.

May
Osasuna finished the season in 11th position in the La Liga table. In other competitions, Osasuna reached the semifinals of the Copa del Rey.

John Aloisi was the top scorer for Osasuna with 8 goals in all competitions.

Kits
Osasuna's kit was manufactured by Spanish sports retailer Astore and sponsored by Caja Navarra.