Seth R. Scranton was first postmaster. He and James J. Downing built a sawmill along the south bank of the river. At that time, according to Duane Broyles and Howard Ness's Vintage Postcards from Old Spokane, postmasters purchased their own equipment and put the post office wherever they chose, whether in a public place or a home.
Spokane County was formed out of Stevens County on October 30, 1879. In 1891 "Falls" was dropped from Spokane's name.