Quoc: Darci Lynne Farmer was named the winner on the season finale, September 20, 2017. She was the third ventriloquist, third child and third female to win a season of America's Got Talent. 10-year-old singer Angelica Hale placed second, and glow light dance troupe Light Balance came in third. Farmer won the show's prize of $1 million and a headlining performance in Las Vegas.

Who won the 2017 america's got talent contest?
HW Chung: OK, some thoughts:
The relevant information to answer the above question is: Darci Lynne Farmer was named the winner on the season finale, September 20, 2017. The answer is Darci Lynne Farmer.