The 1998 Auckland Warriors season was the 4th in the club's history. Coached by Frank Endacott and captained by Matthew Ridge, they competed in the 1998 NRL season, finishing the regular season 15th (out of 20 teams).
For 1998 the Warriors again used a similar style of jersey, produced by Nike, Inc. DB Bitter remained the major sponsor while Bartercard joined as the sleeve sponsor.
The Warriors used Ericsson Stadium as their home ground in 1997, their only home ground since they entered the competition in 1995.
After the National Rugby League season had finished the Warriors played in two trial matches against a New Zealand XIII. These matches acted as a trial for the New Zealand national rugby league team before the October test against Australia and the tour of Great Britain.
Twenty nine players were used by the club in 1998, including four players who made their first grade debuts.
Due to the axing of the Reserve grade competition the Auckland Warriors reserve team played in a series of matches against New Zealand Provincial sides.
Joe Vagana was the Player of the Year.