The 1966 Women's Western Open was contested from August 18–21 at Rainbow Springs Country Club. It was the 37th edition of the Women's Western Open.
This event was won by Mickey Wright.
| Place | Player | Score | To par | Money ($) | |||
|---|---|---|---|---|---|---|---|
| 1 |  Mickey Wright | 72-78-76-76=302 | +2 | 1,500 | |||
| align=center rowspan=2 | T2 |  Margie Masters | 73-79-78-73=303 | align=center rowspan=2 | +3 | align=right rowspan=2 | 1,100 |
| Jo Ann Prentice | 79-73-73-78=303 | ||||||
| 4 | Kathy Whitworth | 74-79-74-77=304 | +4 | 800 | |||
| 5 | Mary Mills | 75-78-77-77=307 | +7 | 675 | |||
| 6 | Judy Kimball | 81-76-79-72=308 | +8 | 500 | |||
| 7 | Betsy Rawls | 79-79-74-77=309 | +9 | 450 | |||
| 8 | Sybil Griffin | 77-79-78-77=311 | +11 | 420 | |||
| 9 | Clifford Ann Creed | 79-78-79-76=312 | +12 | 370 | |||
| align=center rowspan=2 | T10 | Gloria Ehret | 81-82-79-73=315 | align=center rowspan=2 | +15 | align=right rowspan=2 | 315 |
| Shirley Englehorn | 79-80-82-74=315 |