This page allows you to do a look up on Post Offices within Minnesota. If you want all the PO’s that start with 'H', enter 'H' in the PO Name field. If you want all the PO’s in Dakota County, enter 'Dakota' or 'Dak' in the County field. If you see a black envelope next to a Post Office, it means that there is a example of the cancel from the Post Office in the system. Click on the black envelope to see the examples.