1985 US Open
Date	August 27 – September 8
Edition	105th
Category	Grand Slam (ITF)
Surface	Hardcourt
Location	New York City, New York, United States
Champions
Men's singles
Ivan Lendl
Women's singles
Hana Mandlíková
Men's doubles
Ken Flach / Robert Seguso
Women's doubles
Claudia Kohde-Kilsch / Helena Suková
Mixed doubles
Martina Navratilova / Heinz Günthardt
Boys' singles
Tim Trigueiro
Girls' singles
Laura Garrone
Boys' doubles
Joey Blake / Darren Yates
Girls' doubles
Andrea Holíková / Radka Zrubáková
← 1984 · US Open · 1986 →

The 1985 US Open was a tennis tournament played on outdoor hard courts at the USTA National Tennis Center in New York City in New York in the United States. It was the 105th edition of the US Open and was held from August 27 to September 8, 1985.

Seniors

Men's singles

Ivan Lendl defeated John McEnroe 7–6^(7–1), 6–3, 6–4

• It was Lendl's 2nd career Grand Slam title and his 1st US Open title.

Women's singles

Hana Mandlíková defeated Martina Navratilova 7–6^(7–3), 1–6, 7–6^(7–2)

• It was Mandlíková's 3rd career Grand Slam title and her 1st US Open title.

Men's doubles

Ken Flach / Robert Seguso defeated Henri Leconte / Yannick Noah 6–7^(5–7), 7–6^(7–1), 7–6^(8–6), 6–0

• It was Flach's 1st career Grand Slam title and his 1st US Open title. It was Seguso's 1st career Grand Slam title and his only US Open title.

Women's doubles

Claudia Kohde-Kilsch / Helena Suková defeated Martina Navratilova / Pam Shriver 6–7^(5–7), 6–2, 6–3

• It was Kohde-Kilsch's 1st career Grand Slam title and her only US Open title. It was Suková's 1st career Grand Slam title and her 1st US Open title.

Mixed doubles

Martina Navratilova / Heinz Günthardt defeated Elizabeth Smylie / John Fitzgerald 6–3, 6–4

• It was Navratilova's 35th career Grand Slam title and her 8th US Open title. It was Günthardt's 4th and last career Grand Slam title and his only US Open title.

Juniors

Boys' singles

Tim Trigueiro defeated Joey Blake 6–2, 6–3

Girls' singles

Laura Garrone defeated Andrea Holíková 6–2, 7–6

Boys' doubles

Joey Blake / Darren Yates defeated Patrick Flynn / David Macpherson 3–6, 6–3, 6–4

Girls' doubles

Andrea Holíková / Radka Zrubáková defeated Mariana Perez-Roldan / Patricia Tarabini 6–4, 2–6, 7–5