1987 U.S. Women's Open
The 1987 U.S. Women's Open Golf Championship was the 42nd U.S. Women's Open, held July 23–28 at Plainfield Country Club in Edison, New Jersey, a suburb southwest of New York City.
Laura Davies won the first of her four major titles in an 18-hole Tuesday playoff over runners-up Ayako Okamoto and Joanne Carner. The final round concluded on Monday after rain delays. It was Davies' first victory in the United States, and she became the fourth international winner of the championship.
Following this year, the Women's Open was not played in the New York City area for over a quarter century, returning in 2013 at Sebonack on eastern Long Island. In that time, the winner's share of the purse grew over tenfold, from $55,000 to $585,000.Made the cut
Source:Source:Round summaries
First round
Thursday, July 23, 1987
| Place | Player | Country | Score | To par |
| T1 | Dot Germain | | 69 | −3 |
| T1 | Bonnie Lauer | | 69 | −3 |
| 3 | Kathy Postlewait | | 70 | −2 |
| T4 | Ayako Okamoto | | 71 | −1 |
| T4 | Sandra Palmer | | 71 | −1 |
| T4 | Jody Rosenthal | | 71 | −1 |
| T7 | Amy Alcott | | 72 | E |
| T7 | Marci Bozarth | | 72 | E |
| T7 | Laura Davies | | 72 | E |
| T7 | Tammie Green | | 72 | E |
| T7 | Deb Richard | | 72 | E |
Source:Second round
Friday, July 24, 1987
| Place | Player | Country | Score | To par |
| 1 | Laura Davies | | 72-70=142 | −2 |
| T2 | Ayako Okamoto | | 71-72=143 | −1 |
| T2 | Sandra Palmer | | 71-72=143 | −1 |
| T2 | Jody Rosenthal | | 71-72=143 | −1 |
| T5 | Dot Germain | | 69-75=144 | E |
| T5 | Nancy Lopez | | 71-72=144 | E |
| T7 | Marci Bozarth | | 72-73=145 | +1 |
| T7 | Debbie Massey | | 76-69=145 | +1 |
| T7 | Bonnie Lauer | | 69-76=145 | +1 |
| T7 | Martha Nause | | 76-69=145 | +1 |
| T7 | Dottie Pepper | | 73-72=145 | +1 |
| T7 | Cindy Rarick | | 74-71=145 | +1 |
| T7 | Deb Richard | | 72-73=145 | +1 |
Source:Third round
Saturday, July 25, 1987
| Place | Player | Country | Score | To par |
| 1 | Ayako Okamoto | | 71-72-70=213 | −3 |
| 2 | Laura Davies | | 72-70-72=214 | −2 |
| 3 | Martha Nause | | 76-69-70=215 | −1 |
| T4 | JoAnne Carner | | 74-70-72=216 | E |
| T4 | Deedee Roberts | | 74-73-69=216 | E |
| T6 | Rosie Jones | | 75-71-71=217 | +1 |
| T6 | Sally Quinlan | | 75-71-71=217 | +1 |
| T6 | Jody Rosenthal | | 71-72-74=217 | +1 |
| T9 | Tammie Green | | 72-74-72=218 | +2 |
| T9 | Betsy King | | 75-73-70=218 | +2 |
| T9 | Sandra Palmer | | 71-72-75=218 | +2 |
Source:Final round
Monday, July 27, 1987
Play on Sunday was postponed due to heavy rain.
| Place | Player | Country | Score | To par | Money |
| T1 | Laura Davies | | 72-70-72-71=285 | −3 | Playoff |
| T1 | Ayako Okamoto | | 71-72-70-72=285 | −3 | Playoff |
| T1 | JoAnne Carner | | 74-70-72-69=285 | −3 | Playoff |
| T4 | Betsy King | | 75-73-70-71=289 | +1 | 13,461 |
| T4 | Jody Rosenthal | | 71-72-74-72=289 | +1 | 13,461 |
| T6 | Debbie Massey | | 76-69-74-71=290 | +2 | 9,741 |
| T6 | Deedee Roberts | | 74-73-69-74=290 | +2 | 9,741 |
| 8 | Martha Nause | | 76-69-70-76=291 | +3 | 8,390 |
| T9 | Kathy Postlewait | | 70-79-73-70=292 | +4 | 7,111 |
| T9 | Rosie Jones | | 75-71-71-75=292 | +4 | 7,111 |
| T9 | Sally Quinlan | | 75-71-71-75=292 | +4 | 7,111 |
Source:Playoff
Tuesday, July 28, 1987
| Place | Player | Country | Score | To par | Money |
| 1 | Laura Davies | | 71 | −1 | 55,000 |
| T2 | Ayako Okamoto | | 73 | +1 | 23,824 |
| T2 | JoAnne Carner | | 74 | +2 | 23,824 |
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