| 1978 LPGA Championship | |
| Dates: | June 8–11, 1978 |
| Location: | Mason, Ohio |
| Course: | Jack Nicklaus Golf Center Grizzly Course [1] |
| Tour: | LPGA Tour |
| Par: | 72 |
| Yardage: | [2] |
| Format: | Stroke play - 72 holes |
| Cut: | 151 (+7) |
| Purse: | $150,000 |
| Winners Share: | $22,500 |
| Champion: |  Nancy Lopez |
| Score: | 275 (−13) |
| Previous: | 1977 |
| Next: | 1979 |
The 1978 LPGA Championship was the 24th LPGA Championship, held June 8–11 at Jack Nicklaus Golf Center at Kings Island in Mason, Ohio, a suburb northeast of Cincinnati.
Nancy Lopez, a 21-year-old tour rookie, won the first of her three major titles, all at the LPGA Championship at Kings Island. She finished at 275 (−13), six strokes ahead of runner-up
It was the sixth tour win for Lopez and her fourth consecutive in and she won the following week to run the streak to five.[3]
This was the first of twelve consecutive LPGA Championships at Kings Island; the last one in 1989 was also won by Lopez.
Sunday, June 11, 1978
| Place | Player | Score | To par | Money ($) | |||
|---|---|---|---|---|---|---|---|
| 1 | Nancy Lopez | 71-65-69-70=275 | −13 | 22,500 | |||
| 2 | Amy Alcott | 68-68-74-71=281 | −7 | 14,650 | |||
| 3 | Judy Rankin | 67-73-71-72=283 | −5 | 10,510 | |||
| 4 | JoAnne Carner | 71-72-70-71=284 | −4 | 7,700 | |||
| 5 | Jo Ann Washam | 67-69-74-75=285 | −3 | 6,080 | |||
| align=center rowspan=3 | T6 | Donna Caponi Young | 73-72-71-70=286 | align=center rowspan=3 | −2 | align=center rowspan=3 | 4,813 |
| Susan Lynn Grams | 73-73-71-69=286 | ||||||
 Sally Little | 73-71-74-68=286 | ||||||
| align=center rowspan=3 | T9 | Jane Blalock | 72-73-73-69=287 | align=center rowspan=3 | −1 | align=center rowspan=3 | 3,750 |
| Dot Germain | 73-69-75-70=287 | ||||||
| Hollis Stacy | 69-75-72-71=287 |