Corpuz, born to a Filipino father from the Ilocos Region and a Korean mother,[2] is a Hawaii native and attended the Punahou School in Honolulu.

In 2008, she surpassed Michelle Wie as the youngest qualifier in U.S. Women's Amateur Public Links history at 10 years, 3 months and 9 days, and was featured in The New York Times under the headline "Golf's Next Wave".

Corpuz also played as an amateur at the 2016 LPGA Lotte Championship at Ko Olina Resort and carded a second-round 72, but missed the cut by three strokes.

Corpuz was the runner-up to Rachel Kuehn in the 2020 North and South Women's Amateur at Pinehurst Resort, losing in 19 holes.

[4][7] In July 2023, Corpuz won the U.S. Women's Open by three strokes over Charley Hull and Jiyai Shin.