The 1998–99 Women's National Soccer League was the third season of the Women's National Soccer League. The season began on 7 November 1998, and concluded with the grand final on 28 February 1999.
NSWIS Sapphires were the defending champions, as SASI Buffalo Pirates won their first championship in a 2–0 win over Canberra Eclipse in the grand final.
Regular season.
League table.
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