| 1985 State of Origin series | |
|---|---|
| Won by |  New South Wales (1st title) |
| Series margin | 2-1 |
| Points scored | 81 |
| Attendance | 90,937 (ave. 30,312 per match) |
| Top points scorer(s) | Michael O'Connor (29) |
| Top try scorer(s) | Michael O'Connor (2) Dale Shearer (2) |
The 1985 State of Origin series was the fourth time the annual three-match series between New South Wales and Queensland was contested entirely under 'state of origin' selection rules. It was the year that New South Wales finally ended Queensland's dominance which had arisen with the State of Origin concept.