Adñyaman () is a city in southeastern Turkey. It is the administrative centre of Adñyaman Province and Adñyaman District. Its population is 290,883 (2024). The inhabitants of the city are mostly Kurdish.
An unverified theory is that the former name of the city, Hisn-Mansur derives from the name of the Umayyad Emir Mansur ibn Jawana who was killed by the Abbasid Caliph Al-Mansur in this region in 758. Because of the difficulty among the locals in pronouncing Hisn-Mansur, the corruption Semsur emerged.
Various unverifiable theories exist for the name.
The first settlement on the site of the city was the ancient town of Perrhe, part of the kingdom of Commagene before it became part of the Roman and later Byzantine Empire.
It was then captured by the Arabs and became known as Hisn Mansur. It became a contested border town between the Abbasid caliphate and the Byzantines and was therefore well protected; a wall with three gates and a ditch guarded the town while in its middle stood a fortress with double walls.
In the early eleventh century, the town formed part of the Byzantine defences in the Euphrates region together with Edessa, Gargar, Samosata and Chasanara. In 1066/1067, the region around the town was ravaged by a Turkish emir called Gümüshtekën who took booty and captives. By the end of the eleventh century, the Byzantines had lost control of the town and it was now in possession of the Armenian local ruler Kogh Vasil.
The population of Adñyaman is predominantly Kurdish. Demographic studies of Turkey's Kurdish-majority provinces have identified Adñyaman as part of the broader region of southeastern Turkey with a substantial Kurdish-speaking majority. Sociolinguistic research has further documented high rates of Kurmanji (Northern Kurdish) language use in the province, alongside Turkish bilingualism among much of the population.
There is some passing tourist trade, the main tourist attraction being Mount Nemrut.
The city has 33 quarters, including Altñnà Âehir, Yenimahalle, and Esentepe.
Adñyaman University is the sole university in the province. The city's three prominent high schools are Adñyaman Science High School, Esentepe Anatolian High School, and Altñnà Âehir Anatolian High School, respectively.
Adñyaman has a hot summer Mediterranean climate (Csa) under both the Köppen and Trewartha classifications, with some continental characteristics. Summers are very hot and very dry. Temperatures often reach at the height of summer. The highest recorded temperature was on 30 July 2000. Winters in Adñyaman are cool to cold with heavy precipitation. Due to its inland location and relatively high altitude, frost and snow are common. The lowest recorded temperature was on 24 January 1972.