List of Eastern League champions

1973–present

(1) – The two teams finished with identical records at the end of the regular season. York defeated Harrisburg 4–2 in a championship series. There were no formal playoffs until the 1934 season.

(2) – Championship series cancelled due to inclement weather.

(3) – Championship series cancelled. All playoffs under the auspices of the National Association of Professional Baseball Clubs were cancelled after the September 11, 2001 attacks. Teams which were leading series at the time were declared winners, while leagues where series were tied, or had not begun, had teams declared co-champions (except New York–Penn League).