South Wairarapa Mayor Adrienne Staples said the idea had "merit" but she would need to see the actual proposal before giving it more consideration.
"When we look at Hawke's Bay, it has a lot more in common in regards to rural issues, climate and that sort of thing," she said.
"It is a very big area to cover and I would like the opportunity to see the actual proposal before I make any decision."
Carterton Mayor Ron Mark said the idea matched the views expressed by many, especially iwi, but did not think it was a good idea. He said it had been raised when public feedback was called for last year.
"I'm not surprised people see it that way but I think it's a bridge too far for local democracy."
Tararua Mayor Roly Ellis said the council was not considering any change in the governance structure.
"As far as Tararua's concerned, we haven't talked to anyone about a larger regional council coming into this area with Hawke's Bay," he said.
"Until somebody comes and makes a proposal, we will very much stay the same."
Mr Ellis said Tararua covered a large area and any sort of amalgamation would make it difficult to service the district.
"At the moment we're quite happy the way we are," he said.
Wairarapa MP John Hayes said the idea should be looked at as the areas have similar interests.
"I think it's fundamentally important that we're governed by people that understand the community they're in."
Federated Farmers Wairarapa president Jamie Falloon said both areas shared similar features which could benefit the farming community.
"I think it's certainly an option to consider along with the two other options that are proposed to be on the table," he said.
"It's all about getting the best governance and best opportunities for Wairarapa."
Better Wairarapa, a stakeholder group made up of representatives from Wairarapa Chamber of Commerce, Kahungunu Ki Wairarapa, Rangitane o Wairarapa, Sustainable Wairarapa, Wairarapa Economic Development Group and Wairarapa Governance Options Group do not agree with the idea.
Chair Stephanie Gundersen-Reid said Wairarapa had more in common economically, environmentally and in regards to public transport.
"Better Wairarapa would prefer our links with the greater Wellington city," she said.
"The whole of the East Coast is a huge area and we just don't see how it would work."
A final proposal will be presented at a Hawke's Bay Region Council meeting on May 1, before it is it is lodged with the commission before the May 3 deadline.
Wairarapa Greater Wellington Regional Councillor Gary McPhee could not be contacted for comment.
