| Shirley Englehorn Invitational | |
| Location: | Caldwell, Idaho, U.S. |
| Establishment: | 1966 |
| Course: | Purple Sage Golf Course |
| Par: | 71 |
| Tour: | LPGA Tour |
| Format: | Stroke play - 54 holes |
| Purse: | $11,500 |
| Month Played: | September |
| Final Year: | 1968 |
| Aggregate: | 203 Mickey Wright (1966) |
| To-Par: | −10 as above |
| Final Champion: |  Carol Mann |
The Shirley Englehorn Invitational was a women's professional golf tournament in Idaho for three seasons on the LPGA Tour. It was played from 1966 at the Purple Sage Golf Course, north of Caldwell. Tour player Shirley Englehorn, a Caldwell native, hosted the tournament and won in 1967 Purple Sage was one of the final designs of A.V. Macan.
| Year | Dates | Champion | Country | Winning score | To par | Margin of victory | Runner-up | Purse ($) | Winner's share ($) | Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 13–15 | 70-69-69=208 | −5 | 5 strokes | 11,500 | 1,725 | [1] | |||||
| Sep 15–17 | 71-70-69=210 | −3 | Playoff | 11,000 | 1,650 | ||||||
| Sep 16–18 | 65-68-70=203 | −10 | 5 strokes | 10,000 | 1,500 | [2] |