1999–2000 Ulster Rugby season
| Ground(s) | Ravenhill Stadium (Capacity: 12,500) | ||
|---|---|---|---|
| Coach(es) | Harry Williams | ||
| Captain(s) | David Humphreys | ||
| Most appearances | Gary Longwell, Eric Miller, Simon Mason (12 each) | ||
| Top scorer | Simon Mason (145) | ||
| Most tries | Tyrone Howe (4) Spencer Bromley (4) | ||
| League(s) | Heineken Cup (4th in pool) IRFU Interprovincial Championship (2nd) | ||
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The 1999–2000 season was Ulster Rugby's fifth season under professionalism, and Harry Williams's second season as head coach. They competed in the Heineken Cup and the IRFU Interprovincial Championship.
Ahead of the new season, Williams signed Paddy Johns, Simon Best, Niall Malone, Tyrone Howe, Spencer Bromley and Riaz Fredericks to full-time contracts. Mark McCall retired as a player, and was appointed assistant coach.
In the Heineken Cup, Ulster finished bottom of their pool. They came second in the Interprovincial Championship, qualifying for next season's Heineken Cup. Tony McWhirter was Ulster's Player of the Year.
Plans for a Celtic League, featuring the Irish provinces alongside teams from Scotland and Wales, were mooted. This would give the provinces a 12-game league schedule, alongside six Interpros and at least six Heineken Cup matches, and mean contracted players would no longer be available for their All-Ireland League clubs, but play exclusively for their provinces. This plan would not materialise for another few seasons.