Originally part of the Louisiana Purchase, it was first claimed by Spain, then France, and in 1813 was part of Arkansas County, then in 1818 was part of Clark County. On December 9, 1842, Montgomery County became its own county, with Montgomery as its county seat. In 1850 Salem became the county seat, but later that same year the county seat changed again, to Mount Ida, where Whittington's Post Office was located. Mount Ida incorporated in 1854.
Originally part of the Louisiana Purchase it was first claimed by Spain then France and in 1813 was part of Arkansas County then in 1818 was part of Clark County On December 9 1842 Montgomery County became its own county with Montgomery as its county seat In 1850 Salem became the county seat but later that same year the county seat changed again to Mount Ida where Whittington's Post Office was located Mount Ida incorporated in 1854