The 2023 Toyota U.S. Open Swimming Championships took place from November 29 to December 2, 2023, at Greensboro Aquatic Center in Greensboro, North Carolina, United States. Competition was conducted in a long course (50-meter) pool. Swimmers were allowed to compete representing their country, such as Hong Kong, national swimming federation, such as Swimming Canada, club, such as Nation's Capital Swim Club, or unattached.