If so, you may have picked up and dropped off your application at a post office. But the U.S. Postal Service doesn’t process your request. All   passport  applications are received, reviewed, and granted (or not) through the U.S.   Department of State . 

A U.S.  passport provides proof of American citizenship and allows Americans to visit other countries and re-enter the United States again. 

There are roughly 9,000   passport  agencies throughout the United States where you can submit an application, including post offices, public libraries and county and city government offices.