If you're here looking up US Postal Service customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. US Postal Service also goes by or is associated with the names USPS, US Post Service, Postal Service, US Post Office, United States Postal Service, United States Post Office, USPS.com. They are considered to be part of the following sectors and industries: Government - Shipping. US Postal Service is associated with terms like independent by their customers and industry analysts. Their competition, in the eyes of customers, are companies like DHL, UPS, Fedex. They employ 638,000 people according to customers in the know.