Postal Service aims to shut down 3,600 offices - CNN The U.S. Postal Service on Tuesday will release a list of 3,653 post offices that could be shut down. These locations will be studied for possible closure, according to U.S. Postal Service spokeswoman Sue Brennan. Most of the post offices that are on the chopping block have "lower foot traffic and revenue," she said, and the majority of them are in smaller communities. In its release, the Postal Service will also outline what it calls a replacement strategy that will have local post offices partner with third party businesses in those smaller communities to create alternative options.