The 1998 Major League Soccer supplemental draft was held on February 1, 1998, at the Airport Hilton in Fort Lauderdale, Florida.

Major League Soccer held a professional player combine in Fort Lauderdale the last week of January 1998. On Saturday, January 31, 1998, the league held the first round of the 1998 MLS College Draft. The second and third rounds of the college draft concluded Sunday morning. On Sunday afternoon, February 1, 1998, the league held its supplemental draft.

• 1998 expansion teams Chicago Fire and Miami Fusion were awarded the first and second selections in each round.

• 3 February 1997: Colorado Rapids acquired defender Peter Vermes and a third-round pick in the 1998 Supplemental Draft from New York/New Jersey MetroStars in exchange for midfielder Kerry Zavagnin and future considerations.^{[ref 8]}
• 13 November 1997: San Jose Clash acquired a third-round selection in the 1998 Supplemental Draft from Miami Fusion in exchange for forward Christopher Sullivan. Sullivan retired two weeks later.^{[ref 9]}