| 15 August 1947|
| 14 October 1955|
| 140,010 km (54,058 sq mi)|
The Chief Commissioner's Province of Balochistan (Urdu: بلوچستان ,چیف کمشنر صوبہ) was a province of British India, and later Pakistan, located in the northern parts of the modern Balochistan province.
Baluchistan (Chief Commissioner's Province) Wikipedia
The province was originally formed over the period 1876–1891 by three treaties between Robert Sandeman and the Khan of Kalat, Khudadad of Kalat. Sandeman became the Political Agent for the British-administered areas which were strategically located between British India and Afghanistan. A military base was established at Quetta which played a major part in the Second and Third Afghan Wars.
The province became part of Pakistan in 1947 and continued to be administered by a Chief Commissioner. It was dissolved in 1955 when most parts of the western wing of Pakistan became the new province of West Pakistan. West Pakistan was dissolved in 1970. Khan Abdul Wali Khan intended to transfer political power to the Pashtuns. The former Chief Commissioner's province was combined with the former Balochistan States Union and the enclave of Gwadar to form a new, larger Balochistan Province, with a Governor, a Chief Minister and a Provincial Assembly.
The population of the province was equally split between Baloch tribes in the south and west and Pashtun tribes in the north.
The province was administered by a Chief Commissioner appointed by the Federal Government. Although there was no elected legislature the Chief Commissioner could consult the Shahi Jirga, an assembly of tribal leaders.
The province comprised three groups of areas – the settled districts, the political agencies and the tribal area. The settled areas were mainly the district around Quetta and Jaffarabad. The agencies were the Zhob agency to the north of Quetta and the Chagai agency to the west, which had a tenuous land link with the rest of the province. The tribal areas were the Bugti and Marri tribal agencies which would later become Provincially Administered Tribal Areas in the new Balochistan province.