The 21-year-old tennis player in the final match defeated Ons Jaber from Tunisia in two sets with a score of 6:2, 7:6.
The game lasted 1 hour 53 minutes.
Świątek ranks first in the Women's Tennis Association (WTA) rankings.
Zhaber, 28, is in fifth place.
The total prize fund of the US Open was about $60 million.
Swiatek is a two-time winner of the French Open.
Earlier it was reported that Karen Khachanov could not get into the final of the US Open tennis championship.