The information comes amid concerns the country's polytechnic and institute of technology sector will be changed to a centralised model.
There were 5554 equivalent full-time students across the polytechnic's three campuses in 2018, up 8.3% on the previous year.
An economic impact report released this week showed in the past five years the direct value of the polytechnic's Dunedin campus to the city's economy had increased from $136.5million in 2014 to $179.4million in 2018.
In Dunedin, enrolments rose by 5.9% overall last year, attributed to various factors, the most significant of which was the increase in enrolments in trades-related programmes.
More than $8million of total value was added to Cromwell, while $47.2million was added to the Auckland economy.
The number of EFTS enrolled in Cromwell dropped in 2017 to 195, but rose again last year to 207.
The report said a national net immigration increase in 2018 of about 43,400 people had primarily benefited Auckland, but wider investment and growth had filtered down to the regions.
On the Auckland International Campus, student enrolments rose from 935.8 EFTS to 1116.
The Dunedin economy had 2846 full-time equivalent jobs supported through direct polytechnic expenditure in 2018.
Mayor Dave Cull said the statistics in the report reinforced his view the contribution and value of the polytechnic would be ''much diminished and less focused'' if a centralised model were introduced.
He had not had any recent discussions with Education Minister Chris Hipkins.
Excerpts of what appeared to be a draft Cabinet paper outlining a new model were obtained by the National Party and released by opposition education spokesman Dr Shane Reti about two weeks ago.
Under the model, polytechnics would be controlled by a head office and the Government would abolish an ''out of region'' provision for polytechnics .
Otago Polytechnic chief executive Phil Ker said he understood Auckland, but not Cromwell, would be affected.
Mr Ker said he had serious concerns about who was advising Mr Hipkins.
Otago Polytechnic recruited international students in different places to the Manukau Institute of Technology and Unitec - going to different parts of China, for instance.
''The world is a very, very big place.''
The report said the Auckland campus was continuing to grow significantly, and brought 700 full-time equivalent jobs to the city.
In Central Otago, 135 FTE jobs were added to the economy by the Cromwell campus, which equated to a ''sizeable contribution''.
