Granite County Post Offices

60 E Broad St
Drummond, Montana 59832

101 E Main St
Hall, Montana 59837

234 E Broadway St
Philipsburg, Montana 59858

Granite County

There are 3 US Post Offices in Granite County serving a total of 2,710 residents equating to 903 residents per post office. It's estimated that approximately 4,325 packages are handled across the 3 county post offices annually. Granite County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 3,079. Its county seat is Philipsburg. The county was founded in 1893 and named for a mountain which contains the Granite Mountain silver mine."