:1979 US Open (tennis)

{{Use mdy dates|date=July 2023}}

{{Use American English|date=July 2023}}

{{TennisEventInfo|1979|US Open|

| date = August 28 – September 9

| edition = 99th

| surface = Hardcourt

| category = Grand Slam (ITF)

| location = Flushing Meadows, New York City, United States

| venue = National Tennis Center

| champms={{Flagicon|USA}} John McEnroe{{cite web|title=ATP – 1979 US Open Men's Singles Draw|url=http://www.atpworldtour.com/Share/Event-Draws.aspx?Year=1979&EventId=560&Draw=ms|publisher=ATP}}

| champws={{Flagicon|USA}} Tracy Austin{{cite web|title=WTA – 1979 Tournaments – US Open|url=http://www.wtatennis.com/SEWTATour-Archive/Archive/Draws/1979/905.pdf|publisher=WTA|format=PDF}}

| champmd={{Flagicon|USA}} Peter Fleming / {{Flagicon|USA}} John McEnroe{{cite web|title=ATP – 1979 US Open Men's Doubles Draw|url=http://www.atpworldtour.com/Share/Event-Draws.aspx?Year=1979&EventId=560&Draw=md|publisher=ATP}}

| champwd={{Flagicon|NED}} Betty Stöve / {{Flagicon|AUS}} Wendy Turnbull

| champxd={{Flagicon|RSA|1928}} Greer Stevens / {{Flagicon|RSA|1928}} Bob Hewitt

}}

The 1979 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 99th edition of the US Open and the third Grand Slam tennis event of the year. The tournament was held from August 28 to September 9, 1979. John McEnroe and Tracy Austin won the singles titles.{{cite book|author=Bud Collins|title=The Bud Collins History of Tennis|year=2010|publisher=New Chapter Press|location=[New York]|isbn=978-0942257700|pages=197–199|edition=2nd}}{{cite book|title=World of Tennis 1980|year=1980|publisher=Queen Anne Press|location=London|isbn=9780362020120|pages=59–68|author=John Barrett}}