Joanne Ernst is an American former triathlete who won the 1985 Hawaii Ironman Triathlon.
| Date | Position | Event | Swim time | Bike time | Run time | transition time | Total time | |
|---|---|---|---|---|---|---|---|---|
| October 1985 | 1st | Ironman Triathlon, Hawaii | 1:01:42 | 5:39:13 | 3:44:26 | 10:25:22 | ||
| October 1986 | 3rd | Ironman Triathlon, Hawaii | 10:00:07 |
Joanne Ernst is married to management consultant and writer Jim Collins. They have no children.