2012 U.S. Women’s Amateur: Lydia Ko wins at The Country Club

Lydia Ko won the 2012 U.S. Women’s Amateur at The Country Club in Cleveland, Ohio, beating Jaye Marie Green 3 & 1 in the final.

Updated October 22, 2026

Walk this draw in the U.S. Women’s Amateur room.

Edition: 112th
Dates: August 6, 2012 to August 12, 2012
Course: The Country Club, Cleveland, Ohio
Format: stroke-play qualifying + match play
Champion: Lydia Ko · age 15 · New Zealand
Champion's title: 1st U.S. Women’s Amateur
Runner-up: Jaye Marie Green · age 18
Final: 3 & 1
Losing semifinalists: Nicole Zhang and Ariya Jutanugarn
Stroke-play medalist: Hyo-Joo Kim (136)
Defending champion: Danielle Kang · did not play
Entries: 1,124

What happened at the 2012 U.S. Women’s Amateur

Lydia Ko, 15, beat Jaye Marie Green 3 and 1 after needing 122 match-play holes.

Lauren Diaz-Yi beat Jennifer Kirby in 22 holes in the first round.

Final, Jaye Marie Green v. Lydia Ko. Lydia Ko, 15, beat Jaye Marie Green 3 and 1 after needing 122 match-play holes.

The draw

Every match is recorded through the round of 64.

The final, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Lydia Ko	def.	Jaye Marie Green	3 & 1

Semifinals, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Jaye Marie Green	def.	Nicole Zhang	2 up
Lydia Ko	def.	Ariya Jutanugarn	3 & 1

Quarterfinals, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Nicole Zhang	def.	Su-Hyun Oh	2 & 1
Jaye Marie Green	def.	Marijosse Navarro	2 & 1
Lydia Ko	def.	Paula Reto	3 & 1
Ariya Jutanugarn	def.	Erynne Lee	5 & 4

Round of 16, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Nicole Zhang	def.	Hyo-Joo Kim	1 up
Su-Hyun Oh	def.	Jayvie Marie Agojo	4 & 3
Jaye Marie Green	def.	Lisa McCloskey	2 up
Marijosse Navarro	def.	Madeleine Sheils	3 & 1
Lydia Ko	def.	Céline Boutier	1 up
Paula Reto	def.	Jessica Vasilic	4 & 2
Ariya Jutanugarn	def.	Ashlee Dewhurst	3 & 2
Erynne Lee	def.	Austin Ernst	2 & 1

Round of 32, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Hyo-Joo Kim	def.	Isabelle Lendl	2 & 1
Nicole Zhang	def.	Cyna Rodriguez	4 & 3
Jayvie Marie Agojo	def.	Natalie Gleadall	1 up
Su-Hyun Oh	def.	Maia Schechter	5 & 4
Jaye Marie Green	def.	Andrea Lee	2 & 1
Lisa McCloskey	def.	Lauren Diaz-Yi	4 & 3
Madeleine Sheils	def.	Ashlan Ramsey	1 up
Marijosse Navarro	def.	Lee Lopez	1 up
Lydia Ko	def.	Amy Anderson	3 & 2
Céline Boutier	def.	Karen Chung	1 up
Jessica Vasilic	def.	Diana Fernandez	6 & 4
Paula Reto	def.	Bronte Law	2 & 1
Ariya Jutanugarn	def.	Bethany Wu	6 & 4
Ashlee Dewhurst	def.	Breanna Elliott	won on 20th hole
Austin Ernst	def.	Sarah Beth Davis	3 & 2
Erynne Lee	def.	Elisabeth Bernabe	3 & 2

Round of 64, 2012 U.S. Women’s Amateur

Winner		Beaten	Result
Hyo-Joo Kim	def.	Megan Khang	7 & 6
Isabelle Lendl	def.	Whitney Hillier	2 & 1
Cyna Rodriguez	def.	Ani Gulugian	1 up
Nicole Zhang	def.	Jaclyn Jansen	6 & 5
Natalie Gleadall	def.	Grace Na	2 & 1
Jayvie Marie Agojo	def.	Emily Childs	1 up
Maia Schechter	def.	Alina Ching	4 & 3
Su-Hyun Oh	def.	Holly Clyburn	4 & 2
Andrea Lee	def.	Alison Lee	1 up
Jaye Marie Green	def.	Jenna Hague	6 & 4
Lisa McCloskey	def.	Haley Millsap	3 & 1
Lauren Diaz-Yi	def.	Jennifer Kirby	won on 22nd hole
Madeleine Sheils	def.	Sierra Brooks	3 & 1
Ashlan Ramsey	def.	Harin Lee	6 & 5
Marijosse Navarro	def.	Kelly Shon	3 & 2
Lee Lopez	def.	Casey Grice	1 up
Lydia Ko	def.	Amy Beth Simanton	4 & 2
Amy Anderson	def.	Moriya Jutanugarn	1 up
Céline Boutier	def.	Mathilda Poulsen	4 & 3
Karen Chung	def.	Brooke Henderson	4 & 3
Diana Fernandez	def.	Brogan McKinnon	won on 19th hole
Jessica Vasilic	def.	Yueer Feng	4 & 3
Paula Reto	def.	McKenzie Neisen	6 & 5
Bronte Law	def.	Chirapat Jao-Javanil	3 & 2
Ariya Jutanugarn	def.	Jennifer Yang	3 & 1
Bethany Wu	def.	Samantha Swinehart	2 & 1
Breanna Elliott	def.	Casey Danielson	3 & 2
Ashlee Dewhurst	def.	Alexandra Papell	6 & 5
Sarah Beth Davis	def.	Emily Tubert	3 & 2
Austin Ernst	def.	Dottie Ardina	4 & 3
Erynne Lee	def.	Minjee Lee	5 & 4
Elisabeth Bernabe	def.	Demi Frances Runas	1 up

How this was built

Every value is shown as recorded in GNN's U.S. Women’s Amateur data set (research collected through October 20, 2026). "unknown" means no source confirmed it; nothing is estimated. Where sources disagree, the USGA's own record is used.

Data: us-womens-amateur.json.