{{Infoboks_tennisturnering
| titel                 = US Open 2019
| billede               = US OPEN 2019 (48667665777).jpg
| billedtekst           = 
| pixels                = 300
| alt                   = Arthur Ashe Stadium under US Open 2019
| arrangør              = [[United States Tennis Association]]
| turneringsnummer      = 139
| dato                  = [[26. august]] - [[8. september]] [[2019]]<br/>Kvalifikation: [[19. august|19.]] - [[23. august]] [[2019]]
| spillested            = [[USTA Billie Jean King National Tennis Center]]
| værtsby               = [[New York City]], [[USA]]
| underlag              = [[Hardcourt]] (DecoTurf)
| kategori              = [[Grand slam]]
| præmiesum             = [[Amerikansk dollar|$]] 57.238.700 (inkl. [[per diem]])<ref name="prizes">[https://www.usopen.org/en_US/news/articles/2019-07-18/2019-07-18_2019_us_open_prize_money_richest_in_history.html US Open - ''2019 US Open prize money richest in history'' (18. juli 2019)] {{en sprog}}</ref>
| herresingle           = {{flagikon|Spain|3:2|size=18px}} [[Rafael Nadal]]
| herresingle_titel_nr  = 4
| damesingle            = {{flagikon|Canada|3:2|size=18px}} [[Bianca Andreescu]]
| damesingle_titel_nr   = 1
| herredouble           = {{flagikon|COL|3:2|size=18px}} [[Juan Sebastián Cabal]] <br/>{{flagikon|COL|3:2|size=18px}} [[Robert Farah]]
| herredouble_titel_nr  = 1
| damedouble            = {{flagikon|Belgium|3:2|size=18px}} [[Elise Mertens]]<br/>{{flagikon|Belarus|3:2|size=18px}} [[Aryna Sabalenka]]
| damedouble_titel_nr   = 1
| mixeddouble           = {{flagikon|USA|3:2|size=18px}} [[Bethanie Mattek-Sands]]<br/>{{flagikon|GBR|3:2|size=18px}} [[Jamie Murray]]
| mixeddouble_titel_nr  = 2
| antal_tilskuere       = 737.872<ref name="att_record">[https://www.usopen.org/en_US/news/articles/2019-09-08/photos_trevor_noah_michael_douglas_among_celebs_at_mens_us_open_final.html US Open - ''2019 US Open sets all-time attendance record'' (8. september 2019)] {{en sprog}}</ref>
| forrige               = [[US Open 2018|2018]]
| næste                 = [[US Open 2020|2020]]
}}
'''US Open 2019''' var en [[tennis]]turnering, der blev spillet udendørs på [[hardcourt]]-baner i perioden [[26. august]] - [[8. september]] [[2019]] i [[USTA Billie Jean King National Tennis Center]] i [[New York City]], [[USA]]. Det var den 139. udgave af [[US Open (tennis)|mesterskabet]] og den fjerde og sidste [[Grand Slam (tennis)|grand slam]]-turnering i [[2019]]. Kvalifikationen i singlerækkerne blev spillet samme sted den [[19. august|19.]] - [[23. august]] [[2019]].
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