The 1958 Women's Western Open was contested from June 19–22 at Kahkwa Country Club located in Erie, Pennsylvania. It was the 29th edition of the Women's Western Open.
This event was won by Patty Berg.
| Place | Player | Score | To par | Money ($) | |||
|---|---|---|---|---|---|---|---|
| 1 |  Patty Berg | 75-72-71-75=293 | +1 | 950 | |||
| 2 | Beverly Hanson | 72-76-75-74=297 | +5 | 652 | |||
| 3 | Louise Suggs | 76-75-75-73=299 | +7 | 559 | |||
| align=center rowspan=2 | T4 | Mary Lena Faulk | 80-77-70-74=301 | align=center rowspan=2 | +9 | align=center rowspan=2 | 431 |
| Mickey Wright | 78-73-72-78=301 | ||||||
| 6 | Wiffi Smith | 73-77-74-79=303 | +11 | 326 | |||
| 7 | Marilynn Smith | 80-74-79-73=306 | +14 | 289 | |||
| align=center rowspan=2 | T8 | Kathy Cornelius | 76-74-79-78=307 | align=center rowspan=2 | +15 | align=center rowspan=2 | 210 |
| Jackie Pung | 73-77-78-79=309 | ||||||
| align=center rowspan=3 | T10 | Marlene Bauer Hagge | 71-82-76-79=308 | align=center rowspan=3 | +16 | align=center rowspan=3 | 140 |
| Jo Ann Prentice | 76-77-79-76=308 | ||||||
| Joyce Ziske | 79-79-73-77=308 |