Hong, of Allen, took the bronze medal on the balance beam. Hong, a junior at Lovejoy High School, began training at the World Olympic Gymnastics Academy earlier this year.
China dominated this year's world championships in London with a total of nine medals.
The United States picked up a total of five medals during the competition, all won by the women.
Bridget Sloan, Pittsboro, Ind., barely beat out Bross to take the gold in the all-around. And Kayla Williams, of Huntington W.Va., took the gold in the vault Saturday, the first time a U.S. woman has won the world vault title.