Blue County was a political subdivision of the Pushmataha District

Pushmataha District

Pushmataha District was one of three administrative super-regions comprising the former Choctaw Nation in the Indian Territory. Also called the Third District, it encompassed the southwestern one-third of the nation....

 of the Choctaw Nation

Choctaw Nation of Oklahoma

The Choctaw Nation of Oklahoma is a semi-autonomous Native American homeland comprising twelve tribal districts. The Choctaw Nation maintains a special relationship with both the United States and Oklahoma governments...

, in the Indian Territory

Indian Territory

The Indian Territory, also known as the Indian Territories and the Indian Country, was land set aside within the United States for the settlement of American Indians...

. The county was dissolved upon Oklahoma’s statehood in 1907. The territory comprising the former county is incorporated primarily into the present-day Bryan County, Oklahoma

Bryan County, Oklahoma

Bryan County is a county located in the U.S. state of Oklahoma. The population was 36,534 at the 2000 census. Its county seat is Durant. The county shares the same boundaries as the Durant Micropolitan Area. It is also home to the headquarters of the Choctaw Nation of Oklahoma located in Durant...

.

Blue County took its name from the Blue River, an important waterway in the Choctaw Nation. Its county seat was Caddo, Indian Territory—the present-day Caddo, Oklahoma

Caddo, Oklahoma

Caddo is a town in Bryan County, Oklahoma, United States. The population was 944 at the 2000 census. The name is derived from part a native term for "real chief."- History :The early inhabitants were Caddos and Choctaws....

. Blue County was bordered on its north by Atoka County, Choctaw Nation and on its east by Jackson County, Choctaw Nation

Jackson County, Choctaw Nation

Jackson County was a political subdivision of the Pushmataha District of the Choctaw Nation, in the Indian Territory. The county was dissolved upon Oklahoma’s statehood in 1907....

. To its west was the Chickasaw Nation

Chickasaw Nation

The Chickasaw Nation is a federally recognized Native American nation, located in Oklahoma. They are one of the members of the Five Civilized Tribes. The Five Civilized Tribes were differentiated from other Indian reservations in that they had semi-autonomous constitutional governments and...

. Originally larger than in later years, Blue County lost territory when a new county, Jackson County, was carved out of Atoka County, Blue County and Kiamitia County

Kiamitia County

Kiamitia County, also known as Kiamichi County, was a political subdivision of the Choctaw Nation of Indian Territory. The county formed part of the nation’s Pushmataha District, or Third District, one of three administrative super-regions....

in 1886.