Castletown commissioners say more than 140 people support keeping the town's Market Square closed permanently.
They took to social media amid an ongoing row about the future of the town centre, with the local authority seeking to pedestrianise it.
After a public meeting took place, the board said on Facebook the Department of Infrastructure had a petition submitted by more than 140 residents and visitors to support its proposals.
It say the petition shows people want safety, accessibility, and long-term sustainability instead of short-term convenience.
Politician's anger over Post Office profits and cutbacks
Number of post offices to temporarily close for a day
Minister says she can't provide update on NSC floor tiles
Afternoon ferry is next to be cancelled by weather
Difficult to compare Island's Hospice funding with UK, says minister
Mountain Road to close because of gales
New amber warning issued for tonight's storm
Police appeal over theft of building materials