Miller County, Arkansas Territory

Miller County was a county that existed from April 1, 1820 to 1838, first as part of Arkansas Territory and later the State of Arkansas. It included much of what is southeastern Oklahoma and the northeastern counties in Texas (Bowie, Red River, Lamar, Fannin, Cass, Morris, Titus, Franklin, Hopkins, Delta and Hunt). It was named for James Miller, the first governor of the Arkansas Territory.

According to historian Rex W. Strickland, there were three different political entities that have borne the name "Miller County, Arkansas. All have been in the southwestern corner of the state of Arkansas, but covered different areas at different times. The first was created in 1820, before Arkansas became a state. The second existed after Arkansas was required to cede the land that was inside the boundary of Indian Territory. The third was created after Arkansas was required to relinquish its claim to land that was to become part of the Republic of Texas.

Effective April 1, 1820, Miller County was established by the Arkansas Territorial Assembly through a partitioning of Hempstead County. The Act, signed by Territorial Governor James Miller, delineated its borders as follows:

Be it enacted by the General Assembly of the Territory of Arkansas, That all that portion of the County of Hempstead and bounded as follows, to-wit: Beginning on the north bank of the great Red River, at a point due south of the Cossetat Bayou, a branch of Little River, thence due north to the mouth of the Cossetat Bayou aforesaid, then up said bayou to the head of its main branch, then north to the boundary line of Clark, then due west with said line to the Canadian river, or the Indian boundary line, then with the said line to the great Red river aforesaid, then southeasterly with the Indian or Spanish boundary line to a point due south of the point of beginning, then due north to the beginning, to be laid off and erected into a separate county, to be called and known by the name of the county of Miller.

In modern terms, Old Miller County included parts of three states: Arkansas ( Little River, Sevier and Polk counties), Oklahoma (LeFlore and Latimer counties, Choctaw, McCurtain and Pushmataha counties) and Texas.

The 1820 territorial census listed 999 residents in Miller County, 82 of them slaves. Initially, the county seat was the Gilliland Settlement. In August 1821, the county commissioners selected Miller Court House as the county seat. The Miller Court House community was established at a community previously called Shawneetown, 7 miles (11 km) west of the present town of Idabel, Oklahoma. The post office was established September 7, 1824.

...
Wikipedia