Boundary County Post Offices

7167 1st St
Bonners Ferry, Idaho 83805

100 E Ferry Ave
Eastport, Idaho 83826

3197 Roosevelt Rd
Moyie Springs, Idaho 83845

100 Highway 95
Naples, Idaho 83847

3329 Porthill Loop Rd
Porthill, Idaho 83853

Boundary County

There are 5 US Post Offices in Boundary County serving a total of 10,943 residents equating to 2,189 residents per post office. It's estimated that approximately 17,466 packages are handled across the 5 county post offices annually. Boundary County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 10,972. The county seat and largest city is Bonners Ferry. Boundary County was created by the Idaho Legislature on January 23, 1915. It is so named because it borders Canada, the only county in Idaho with an international border."