Sistan and Baluchestan in the context of "Baluchistan"

Balochistan (/bəˈloʊtʃɪstɑːn, bəˌloʊtʃɪˈstɑːn, -stæn/ bə-LOHTCH-ist-a(h)n, -⁠A(H)N; Balochi: بلۏچستان, romanized: Balòcestàn, [baˈloːt͡ʃest̪ɑːn]), also spelled as Baluchistan or Baluchestan, is a historical region in West and South Asia, located in the Iranian plateau's far southeast and bordering the Indian Plate and the Arabian Sea coastline. This arid region of desert and mountains is primarily populated by ethnic Baloch people.Balochistan is very significant because of its strategic location, mineral wealth, long coastline at the mouth of the Persian Gulf, and potential for discoveries of oil and gas.

The Balochistan region is split among three countries: Iran, Afghanistan and Pakistan. Administratively it comprises the Pakistani province of Balochistan; the Iranian province of Sistan and Baluchestan, along with southern Kerman province, southern South Khorasan province and eastern Hormozgan province; and the southern areas of Afghanistan, which include Nimruz, Helmand and Kandahar provinces. It borders what was historically the Pashtunistan region to the north, Sindh and Punjab to the east, and Persian regions to the west. Its southern coastline, including the Makran Coast, is washed by the Arabian Sea, in particular by its western part, the Gulf of Oman.

Eastern Iran includes the provinces North Khorasan, Razavi Khorasan, South Khorasan, and Sistan and Baluchestan some of which share a border with Afghanistan and Pakistan. Some references also count Kerman Province to this region.

Dominated by deserts, this region is characterised by an arid or hyper-arid climate.

Makran (Balochi: مڪران), also mentioned in some sources as Mecran and Mokrān, is the southern coastal region of Balochistan. It is a semi-desert coastal strip in the Balochistan province in Pakistan and in Iran, along the coast of the Gulf of Oman. It extends westwards, from the Sonmiani Bay to the northwest of Karachi in the east, to the fringes of the region of Bashkardia/Bāšgerd in the southern part of the Sistan and Baluchestan province of modern Iran. Makrān is thus bisected by the modern political boundary between Pakistan and Iran. In January 2025, a government spokesperson informed that Iran is investigating the possibility of moving its capital to the Makran region.

South Khorasan province (Persian: استان خراسان جنوبی) is one of the 31 provinces of Iran, located in the eastern part of the country. Its capital is the city of Birjand. In 2014, the province was placed in Region 5. This province is bordered to the north by Razavi Khorasan Province, to the northwest by Semnan Province, to the west by Isfahan and Yazd Provinces, to the south by Kerman Province, and to the southeast by Sistan and Baluchestan Province. The area of this province is 151,913 square kilometers (58,654 square miles), making it the third largest province in Iran after Kerman and Sistan and Baluchestan. According to the 2016 census, South Khorasan's population is 768,898, making it the fourth least populous province in the country. With only about 5 inhabitants per square kilometre or 13 inhabitants per square mile, it is the most sparsely populated province in Iran.

South Khorasan Province is split into two distinct regions: the "mountainous and elevated" areas in the north and northwest, and the "low and flat" central and southern plains. The tallest mountains in the province include "Kamarak" and "Shah Kuh." It experiences a "dry and desert" climate, which can be further divided into "hot and dry" and "mild and dry" categories. The northern and northwestern parts are more fertile, while the southern and southwestern plains endure a dry and harsh climate. The rivers in this region are seasonal, with no permanent rivers present.