2004 Eastern League season

The 2004 Eastern League season began on approximately April 1 and the regular season ended on approximately September 1.

The New Hampshire Fisher Cats defeated the Altoona Curve 3 games to 0 to win the Eastern League Championship Series.

Standings
Notes:
 * Green shade indicates that team advanced to the playoffs
 * Bold indicates that team advanced to ELCS
 * Italics indicates that team won ELCS

Northern Division
The New Hampshire Fisher Cats defeated the Binghamton Mets in the Northern Division playoffs 3 games to 1.

Southern Division
The Altoona Curve defeated the Erie SeaWolves in the Southern Division playoffs 3 games to 0.

Championship Series
The New Hampshire Fisher Cats defeated the Altoona Curve in the ELCS 3 games to 0.