The 1998–99 Hong Kong First Division League season was the 88th since its establishment.
The first match was played on 30 August 1998 with Instant-Dict drew South China 2–2.
However, as there was an ineligible player in Instant-Dict's squad and the team was penalised with a 0–3 loss.
[1] [2] NB: Teams take points and goals halved from first phase.
GF and GA is rounded.