The 1998 US Open was a tennis tournament played on outdoor hardcourts at the USTA National Tennis Center in New York City in New York in the United States.

It was the 118th edition of the US Open and was held from August 31 through September 13, 1998.

Patrick Rafter defeated Mark Philippoussis, 6–3, 3–6, 6–2, 6–0 Lindsay Davenport defeated Martina Hingis, 6–3, 7–5 Sandon Stolle / Cyril Suk defeated Mark Knowles / Daniel Nestor, 4–6, 7–6, 6–2 Martina Hingis / Jana Novotná defeated Lindsay Davenport / Natasha Zvereva 6–3, 6–3 Serena Williams / Max Mirnyi defeated Lisa Raymond / Patrick Galbraith 6–2, 6–2 David Nalbandian defeated Roger Federer 6–3, 7–5 Jelena Dokić defeated Katarina Srebotnik 6–4, 6–2 K. J. Hippensteel / David Martin defeated Andy Ram / Lovro Zovko 6–7, 7–6, 6–2 Kim Clijsters[1] / Eva Dyrberg defeated Jelena Dokić / Evie Dominikovic 7–6, 6–4