For its first four years, Idabel local government was the responsibility of the Choctaw tribe for the Indians themselves. The national government was responsible for enforcing the law among non-Choctaws. In 1906, the citizens elected their first mayor and established a mayor-council form of government. At the time of statehood, November 16, 1907, the town was designated as the county seat of McCurtain County. A census in that year reported 726 residents. By 1910, the population had grown to 1,493. In 1920, there were 3,617 residents, but the number fell to 2,581 in 1930. Growth resumed by the end of the Great Depression in the late 1930s.