They are urging Post Office bosses to urgently establish a replacement service for local residents.
Customers will face having to travel to Ellon or Balmedie for postal services.
Officials are describing the closure on April 23 as “temporary” and say they are trying to find a permanent location.
The post office and shop in Main Street has an official notice announcing the shutdown. The situation has arisen due to the resignation of the postmaster.
Community council secretary Glen Douglas said: “The community council was disappointed to learn of the closure of Newburgh Post Office at the end of April.
“It will be a severe inconvenience to those requiring to collect pensions or post anything larger than a letter
“It is hoped that the Post Office will put in hand urgently a replacement service for the community, however when they were contacted in late February they had no plans in place.”
Ellon and District Councillor Isobel Davidson urged the Post Office to look at all options for a local service.
She said: “It is really disappointing to see a local shop and Post Office close but I understand how difficult it is to sustain these services in rural areas.
“I hope that the existing Post Office can be relocated to another local premises and that all opportunities are explored.”
One local woman, who declined to be named, said the post office would be a huge loss to the community.
She added: “It is really sad to see it going. It will mean a great deal of inconvenience for a lot of people.
“The post office say it will only be temporary, but these things have a habit of dragging on.”
A Post Office spokesperson said: “We can confirm that Newburgh Post Office will be temporarily closing on April 23. This is due to the resignation of the Postmaster and the premises being withdrawn for Post Office use from this date.
“We are working hard to find a permanent location for the Post Office and we hope to be able to provide further information on a proposed new location soon.
“We know how important Post Office services are to people in Newburgh and we are committed to maintaining services in the area.”