In the final, she beat Marketa Vondrousova of the Czech Republic 6-1, 6-3.
"It's unbelievable, I'm a little bit speechless. I played the perfect match today. I'm so proud of myself and my team, it's been an incredible two weeks", Barty said. "It's a special place for Australians here. Sam (Stosur) has done well here before and come so close. It's been a magical two weeks".
The 19-year-old Vondrousova has congratulated her rival, saying "congratulations to you and your team, you gave me a lesson".
In 2018, Barty won the US Open women’s doubles together with CoCo Vandeweghe of the United States.