More than 8,000 people in the over-80s in Honiton and Sidmouth risk losing Winter Fuel Payments.
The latest official statistics reveal that these pensioners, previously benefiting from £300 each to stay warm, are set to lose this support unless they qualify for other benefits.
The cuts affect those who previously received pension credit.
The Liberal Democrats have voiced concerns over the government's decision, urging ministers to "protect vulnerable pensioners".
In total, 25,921 pensioners in Honiton and Sidmouth risk losing support due to the cuts.
The Liberal Democrat MP for Honiton and Sidmouth, Richard Foord, said: "Thousands of people in Mid- and East Devon are desperately worried about how they will make ends meet this winter.
"Vulnerable older pensioners shouldn’t be racked with worry; these figures are deeply worrying.
"I have heard countless stories from those who now say they will have to choose between staying warm or putting food on the table as a result of this Government’s decision.
"Cutting these payments for thousands who are barely getting by, is the wrong decision.
"It is not too late for the Government to change course, reverse these proposals and protect vulnerable pensioners in Devon this winter."
Nationally, Age UK has previously stated that 2.5 million pensioners will "be in serious trouble" this winter due to the cutting of the payments.
The Liberal Democrats have called on the Government to "reverse these proposals and protect vulnerable pensioners" this winter.
The winter fuel payment is a tax-free payment designed to help elderly people cover their heating costs.
Following the Chancellor’s announcement in July, winter fuel payments – previously eligible for all pensioners – will now be limited to those who receive pension credit.
The policy has proved to be controversial as the Labour leadership lost a conference vote on winter fuel payments at the Labour conference.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here