The 2004 Toyota Atlantic Championship season was contested over 12 rounds.

In this one-make formula all drivers had to utilize Swift chassis and Toyota engines.

This season also saw a C2-class running older Swift chassis and Toyota engines.

The Toyota Atlantic Championship Presented by Yokohama Drivers' Champion was Jon Fogarty driving for Pacific Coast Motorsports.

Scoring system R19=retired, but classified NS=did not start (8)=place after practice, but grid position not held free