The 2019 Washington Open (called the Citi Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts.

It was the 51st edition (for the men) and the 9th edition (for the women) of the Washington Open.

The event was part of the ATP Tour 500 series of the 2019 ATP Tour, and of the WTA International tournaments of the 2019 WTA Tour.

FitzGerald Tennis Center in Washington, D.C., United States, from July 29 to August 4, 2019.

[2] 1 Qualifiers prize money is also the Round of 64 prize money * per team The following players received wild cards into the main singles draw: The following players received entry from the singles qualifying draw: The following players received entry as lucky losers: The following pairs received wildcards into the doubles main draw: The following pair received entry from the doubles qualifying draw: The following players received wild cards into the main singles draw: The following player received entry using a protected ranking into the singles main draw: The following players received entry from the qualifying draw: The following pair received a wildcard into the doubles main draw: