2015 U.S. Women's Open: In Gee Chun wins at Lancaster Country Club
In Gee Chun won the 2015 U.S. Women's Open at Lancaster Country Club, Lancaster, Pennsylvania, United States with 272 (−8), by 1 stroke over Amy Yang.
Updated October 23, 2026
Every year is on the U.S. Women's Open winners list.
- Dates
- July 9, 2015 to July 12, 2015
- Course
- Lancaster Country Club, Lancaster, Pennsylvania, United States
- Edition
- 70th edition
- Counted as a major
- yes
- Format
- stroke play, 4 rounds
- Par
- 70 · 6,483 yards
- Entries
- 1,873
- Field
- 156
- Made the cut
- 63 (cut at 144)
- Purse
- $4,500,000 · winner's share $810,000
- Champion
- In Gee Chun · age 20 · South Korea · born Gunsan, North Jeolla Province, South Korea
- Champion's title
- 1st title at this event · 1st major
- World ranking
- No. 20 (Rolex Rankings)
- Winning score
- 68-70-68-66 = 272 (−8) · won by 1 stroke
- Runner-up
- Amy Yang (273)
- 54-hole leader
- Amy Yang · In Gee Chun was 4 strokes back
- Caddie
- Dean Herden
- Low amateur
- Megan Khang (285)
- Run by
- United States Golf Association
Winner and runner-up
| Pos. | Player | R1 | R2 | R3 | R4 | Total | To par |
|---|---|---|---|---|---|---|---|
| 1 | In Gee Chun | 68 | 70 | 68 | 66 | 272 | −8 |
| 2 | Amy Yang | 67 | 66 | 69 | 71 | 273 | −7 |
What happened at the 2015 U.S. Women's Open
In Gee Chun birdied Nos. 15, 16 and 17 in a closing 66 to come from four strokes back and win in her first U.S. Women's Open start.
Amy Yang drove the par-4 16th green and made eagle, then birdied the 17th to get within one, but bogeyed the 18th.
How this was built
Every value is shown as recorded in GNN's U.S. Women's Open data. A value no source confirmed is left out; nothing is estimated. Where sources disagree, the organizer's own record is used.
Data: womens-golf-majors_dataset_2026-10-20.json (GNN's women's majors research set, "master" row for this year, research dated October 20, 2026).
Also from GNN's U.S. Women's Open set (entries, runners-up round by round, values the majors set does not hold).
Sources
- usga.org: 26USWomensOpen
- Wikipedia: 2015 U.S. Women's Open
- mediacenter.usga.org: 2026 U.S. Women's Open Fact Sheet V2
- Wikipedia: Women's major golf championships
- Wikipedia: U.S. Women's Open
- Wikipedia: Chun In-gee
- golfcompendium.com: 2015 us womens open
- golfcompendium.com: low amateurs us womens open
- lpga.com: 2015 final round quick recap us womens open
- filecache.mediaroom.com: 21 U.S. Women's Open
- espn.com: leaderboard
- lpga.com: 2015 news and notes final round us womens open
- gettyimages.com: in gee chun caddie 2015
- asapsports.com: show interview
- rolexrankings.com: rankings