Formby Labour Councillor Catie Page said it was "ridiculous" that the town was being carved in two by the Tory-led government's boundary changes.
Under the changes announced today, Ravenmeols sits in the Maghull constituency while Harington goes to Southport.
Cllr Page who represents Ravenmeols, said it was outrageous that the community of Formby was being split.
Cllr Page said: "I really think it is ridiculous that a town like Formby is being artificially carved in two.
"That means we will have two different MPs. It will cause confusion and a lot of upset.
"While I know our current MP Bill Esterson will continue to fight for the interests of Formby as a whole, we may not get the same from a Southport MP whose primary concern will be Southport."
Cllr Page said the changes were being forced through by a Tory-led government which was trying to redraw boundaries for its own advantage - at the expense of communities like Formby.
Cllr Page said: "This is nothing short of a betrayal by the Conservatives of the community of Formby.
"We are a historic community which the Tories are tearing in two for their own political advantage. And they don't care about the concerns of the people in this community.
"This is not democratic and it is not in our interests.
"The Formby Labour Action Team and I will continue to fight for the interests of our full community here in Formby, regardless of this Tory-led government's attempts to split us in two."