The numbers of students dealt with by the provost dropped from 20 in the first half of last year, to seven in the same time this year, and the number going to the proctor dropped from 271 to 247.
The proctor also deals with Otago Polytechnic students and non-students caught trespassing on university grounds.
Student services director David Richardson said it was too early to pin point the reasons for the decline.
He noted a decline in the number of students fined by the proctor's office, from 77 in the first half of last year, to 39 in the corresponding period this year. The total value of fines also dropped, from $8030 to $5585.
The number dealt with for fuelling or setting fires also dropped from a combined total of 60 in the period last year, to 28 this year.
Otago University Students' Association president Francisco Hernandez said the drop in students being disciplined was pleasing.
"The feedback we've had from police, the university and the wider community is that in general University of Otago students are behaving well and trouble makers are a minority," he said.