Postal Service spokeswoman Joanne Veto said there were no post office closures planned, an office being larger than those designated as either a branch or a station, CNNMoney.com reported.
Veto said the Postal Service has locations with "fewer than five transactions a day."
A second spokeswoman, Sue Brennan said, "We have nearly 32,000 post offices and only 19 percent cover their costs."
The agency posted a net loss of $8.5 billion in its 2010 fiscal year, more than double the loss of $3.8 billion in its fiscal year for 2009. With the Internet taking away business in personal letters, advertising and bills sent in paper form the Postal Services delivered about 6 billion fewer pieces of mail in fiscal 2010 compared to the previous fiscal year.