The 1959 U.S. Women's Open was the 14th U.S. Women's Open, held June 25–27 at Churchill Valley Country Club in Blackridge, Pennsylvania, a suburb east of Pittsburgh. It was the seventh edition conducted by the United States Golf Association (USGA).

Defending champion Mickey Wright won the second of her four U.S. Women's Open titles, two strokes ahead of runner-up Louise Suggs, a two-time champion. Suggs led after 36 holes, but a third round 75 pushed her four strokes back. Wright, age 24, putted well in the final round and was two-under after fifteen holes, but bogeyed the final three. She was the first of seven to successfully defend the championship, last accomplished by Karrie Webb in 2001. It was the third of 13 major championships for Wright.

In this competition, Patty Berg became the first woman to hit a hole-in-one during any USGA competition.

This was the third major in three years at Churchill Valley, which hosted the LPGA Championship in 1957 and 1958. The club closed in 2013.

Saturday, June 27, 1959

Place	Player	Score	To par	Money ($)
1	Mickey Wright	72-75-69-71=287	+7	1,800
2	Louise Suggs	71-74-75-69=289	+9	1,200
T3	Marlene Hagge	71-76-73-72=292	+12	650
	Ruth Jessen	75-74-72-71=292
	Joyce Ziske	75-73-72-72=292
6	Patty Berg	72-75-75-74=296	+16	400
7	Betsy Rawls	76-73-72-76=297	+17	350
8	Murle MacKenzie	77-75-75-71=298	+18	300
9	Anne Sander (a)	75-76-75-73=299	+19	0
10	JoAnn Prentice	77-74-77-74=302	+22	260

Source:

• USGA final leaderboard
• U.S. Women's Open Golf Championship
• U.S. Women's Open – past champions – 1959

40°27′00″N 79°50′42″W / 40.450°N 79.845°W / 40.450; -79.845