The area is situated on the site of Dakota Sioux trails that connected two sites of cultural significance to the Dakota people, the pipestone quarries in southwestern Minnesota and the Sioux Crossing of the Three Rivers, near present-day Fort Thompson.

It was made in 1857, connecting Fort Ridgley, Minnesota with South Pass in Wyoming Territory, along the Oregon Trail.

[6] The Chicago and North Western railroad opened tracks from Hawarden, Iowa, to Iroquois, crossing northwest across the county in 1882.

The first settler in Miner County was Matthew A. Moore, who homesteaded near the present site of Howard in the spring of 1879.

[8] The current Miner County Courthouse was built in 1938 at a cost of $107,000 by the Great Depression-era Public Works Administration and was dedicated on September 26, 1938.

[7] On June 13, 1943, two B-17 bombers from the 393rd Bomb Group of the Sioux City Army Air Base collided while on a training exercise over Miner County.

[9] The terrain of Miner County consists of rolling hills, dotted with lakes and ponds, and generally devoted to agriculture.

[10] The terrain generally slopes to the south and southwest, with its highest point occurring along the north boundary line in the northeast part of the county, at 1,729 ft (527 m) ASL.

Source:[10] Miner County voters have tended to vote Republican the past two decades.