Determining which governmental agency is most popularly used by Americans will be an undertaking which will depend upon the overall needs of individuals. Because there are so many governmental agencies which provide various and numerous services, determining which is more popular will prove to be the one that provides for the most general services and those that are utilized by most Americans. Therefore, though the conclusion may be arguable, it can be deemed that the most popularly used among all governmental agencies is the United States Post Office.
The United States Post Office is often the primary source for people to use in regards to mailing and shipping needs. Furthermore, the Post Office also offers other services, in particular, being a designated passport application processing center, which furthers the services made available to American people.