Nineteen Otago workers were among the 237 redundancies made by New Zealand Post Group in the first half of this year.
All the Otago redundancies were in the delivery and processing area.
Another seven Otago jobs have gone through natural attrition but the province had an increase of two in the number of fixed-term contracts renewed.
Acting group chief executive Sam Knowles said that in addition to the 237 redundancies nationally, a further 86 job reductions had occurred through natural attrition and 61 fixed term contracts had not been renewed.
However, 90 new roles had been created.
The biggest reduction in jobs, through natural attrition, redundancy and contract non-renewal, occurred in Auckland (205).
Canterbury lost 77, Manawatu 26 and Waikato 22.
Wellington had a gain of six jobs mainly as the result of a boost in numbers at Kiwibank.
New Zealand Post has about 10,000 staff and Mr Knowles said the redundancies were a response to "difficult" trading conditions brought about by the impact of the economic downturn on mail volumes and business communications.
About 90% of the job reductions occurred in the postal services business while Kiwibank was experiencing "substantial growth".
Engineering, Printing and Manufacturing Union national organiser Anna Kenny said the union had arranged an independent analysis of the company's books "to ensure that cuts are only made where they can be justified by falling mail volumes".
Ms Kenny said international mail volumes were "collapsing".
"We can't control that. It means some of our members are losing their jobs but what we can do is make sure the job losses are minimised."
Ms Kenny said a four-day week scheme negotiated several months ago was saving jobs.
