Goals Against Average is goals allowed per 60 minutes by a goalie. Lower is better. Below are the top 18 NHL playoff players ranked by Playoff Goals Against Average for 1978-79.
| # | Player | Team | GAA |
|---|---|---|---|
| 1 | 0.00 | ||
| 2 | 0.00 | ||
| 3 | 1.91 | ||
| 4 | 2.21 | ||
| 5 | 2.28 | ||
| 6 | 2.50 | ||
| 7 | 2.50 | ||
| 8 | 3.00 | ||
| 9 | 3.06 | ||
| 10 | 3.42 | ||
| 11 | 3.43 | ||
| 12 | 3.48 | ||
| 13 | 4.06 | ||
| 14 | 4.28 | ||
| 15 | 4.63 | ||
| 16 | 4.70 | ||
| 17 | 4.83 | ||
| 18 | 5.43 |