US mail service is government organization or private corporation?

I dont understand USPS is government organization or private corporation, what benefits of sending goods over USPS comparing to private companies if i need to send around short ton of goods?US mail service is government organization or private corporation?
USPS is a function of the US government. However, there are other shipping options, particulary overseas, so you need to do some comparison shopping.
its governmentUS mail service is government organization or private corporation?
its govt.
The USPS is quasi private, cheaper, slower and makes more errors.US mail service is government organization or private corporation?
Government organization. Federal. That's why stealing mail is a federal offense.