1998–99 Panionios F.C. season

Panionios reached the quarter-finals of the Cup Winners' Cup for the first time in their history, being knocked out 7-0 on aggregate by eventual champions Lazio.

However, league form suffered and the club only avoided relegation on goal difference.

Manager Ronnie Whelan left at the end of the season.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.