Tory MP Dame Caroline Spelman, who represents the Church of England in the Commons, says work is underway to put signal boosters at the top of the buildings in 'not-spot' areas where signals are particularly bad.
Speaking in the Commons about the impact the churches could have, she said: "As long as there's a line of sight between a church tower and another church tower or high building, it is possible to provide internet coverage in remote rural areas which presently have no signal.
She spoke of the WiSpire project in Norfolk, which has provided wi-fi internet signal boosters across the Diocese of Norwich's churches.
She suggested that ancient or even listed churches could be used and added that discussions were under way to expand the scheme into Suffolk and Cambridgeshire.
"The absolute key to this is knowing where the not-spots are," she said.