Pontefract Coun Philip Booth has slammed the Pontefract and Castleford MP for voting with 290 Labour MPs for closures in a House of Commons vote on March 19.
Ms Cooper has pledged her support to campaigners fighting the proposed closure of the Hardwick Road and Pontefract Road branches of the post office.


But Coun Booth said: "She voted for closures. She voted with the government for closures. What can I say? She's here to represent a constituency.
"They say post offices are losing money, but in the same breath television licences have been made available online, road tax discs have been moved out. If they are going to move business out of the post office, we're going to lose business at the service."


He added: "Last week, when Coun Mark Crowther reminded her that she voted in favour of closures, she said to him: 'Let's not play politics'.
"But it's due to the politics of the Labour government that we have come to this situation.
"We are desperate to keep the post offices open and we will hammer on until the end."
Ms Cooper (pictured) said the vote in parliament was on a Conservative motion which would not have stopped post office closures and didn't back the £1.7bn the Labour government had promised to subsidise post offices to keep as many as possible open.


She said: "Post offices are losing money because more and more people are using bank accounts and the internet, but as usual the Tories are trying to have it both ways and pretend to be against closures whilst not backing the cash post offices need."
She said Post Office Ltd's proposal to close the Hardwick Road branch seemed "to break all its own rules" and residents' nearest alternative was more than a mile away.


She added: "It also means around a fifth of the town will be over a mile from a post office, contrary to the national guidelines. That's not fair on Pontefract. Fewer people are using post offices nationally, that's why all the political parties have recognised the network can't continue at its current size. But changes need to be fair to all areas."