1999–2000 Millwall F.C. season

Millwall had a good season and finished fifth in the Second Division, qualifying for the play-offs, but were beaten in the semi-finals by Wigan Athletic 1–0 on aggregate.

The club also saw failure in both domestic cup competitions, being eliminated from both in the first round.

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.

This article about an English association football club season is a stub.