"We are taking COVID-19 very seriously but that doesn't mean Anzac Day in Hamilton will not be observed," she said.
"Hamiltonians will still want to honour our veterans and defence force personnel on what is a very special day for the city and for New Zealand.
"We're already considering how we might work with the RSA to mark the occasion in another way and will advise details as soon as possible. But it won't include official public gatherings of any kind."
Hamilton RSA President Jan Luttrell said the health of its members and the wider community was the organisation's priority.
"This is a difficult decision in an unprecedented environment, and we apologise to our Veterans and their families," she said.
The RSA's annual Poppy Day fundraising appeal has also been postponed, and the installation of white crosses on Memorial Park, coordinated by the Fields of Remembrance Trust, will not go ahead.
People may still choose to visit the city's cenotaph or other memorial sites to pay their respects on or around Anzac Day.
Those who do should follow Ministry of Health advice available at the time. That includes avoiding personal contact, staying home if you feel unwell, and coughing or sneezing into your elbow or by covering your mouth and nose with tissues.