1998 Eastern League season

The 1998 Eastern League season began on approximately April 1 and the regular season ended on approximately September 1.

The Harrisburg Senators defeated the New Britain Rock Cats 3 games to 1 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 Britain Rock Cats defeated the Binghamton Mets in the Northern Division playoffs 3 games to 1.

Southern Division
The Harrisburg Senators defeated the Akron Aeros in the Southern Division playoffs 3 games to 1.

Championship Series
The Harrisburg Senators defeated the New Britain Rock Cats in the ELCS 3 games to 1.