The ownership of "Post Office" depends on the country:

• In the United States, the United States Postal Service (USPS) owns and operates the Post Office. USPS is an independent agency of the executive branch of the U.S. federal government. It was created by the Postal Reorganization Act of 1970 and has been operating since July 1, 1971. USPS does not receive direct government funding but relies on revenue from the sale of stamps and services. It is government-owned but operates independently within the executive branch.

• In the United Kingdom, Post Office Limited owns and operates the Post Office network. It is a state-owned retail post office company registered in England and Wales, providing postal and non-postal products through about 11,500 branches. Most branches are run by franchise partners or independent subpostmasters, with a small number of Crown post offices directly managed by Post Office Limited. It is a public corporation under the Department for Business and Trade in the UK government.

Thus, the Post Office in the U.S. is owned by the federal government through the USPS, while in the UK, it is state-owned through Post Office Limited, a government public corporation. If you have a specific country in mind, that can be clarified further.