The 2003 Las Vegas Gladiators season was the 7th season for the franchise.

Before the season started, the Gladiators moved from East Rutherford, New Jersey, to Las Vegas, Nevada.

[1] They finished at 8–8, 3rd in the Eastern Division and lost by a score of 69-26 to the Arizona Rattlers in the first round of the playoffs.

[1] This was the Gladiators' only playoff appearance in Las Vegas.

Frank Haege entered his second season as the head coach of the Gladiators.