| Native Name: | Վասպուրական |
| Conventional Long Name: | Kingdom of Vaspurakan |
| Common Name: | Vaspurakan |
| Era: | Middle Ages |
| Status: | Kingdom |
| Government Type: | Monarchy |
| Event Start: | Gagik I recognized as King of Armenia by Arab Caliph |
| Year Start: | 908 |
| Event End: | Senekerim-Hovhannes gives Vaspurakan to the Byzantine Empire |
| Year End: | 1021 |
| P1: | Bagratid Armenia |
| Flag P1: | Bagrotouni.svg |
| S1: | Byzantine Empire |
| Flag S1: | Simple Labarum.svg |
| Image Map Caption: | The Kingdom of Vaspurakan from 908 to 1021 |
| Capital: | Van |
| Common Languages: | Armenian |
| Religion: | Armenian Apostolic Church |
| Currency: | Solidus (coin), Hyperpyron |
| Leader1: | Gagik I Artsruni |
| Leader2: | Derenik-Ashot |
| Leader3: | Abusahl-Hamazasp |
| Leader4: | Ashot-Sahak |
| Leader5: | Gurgen-Khachik |
| Leader6: | Seneqerim-Hovhannes |
| Year Leader1: | 908–937/943 |
| Year Leader2: | 937/943—958/959 |
| Year Leader3: | 958/959–968/969 |
| Year Leader4: | 968/969–1003 |
| Year Leader5: | 991–1003 |
| Year Leader6: | 1003–1021 |
| Title Leader: | King |
| Today: | Turkey Iran Iraq Azerbaijan |
The Kingdom of Vaspurakan (; also transliterated as Vasbouragan from Western Armenian) was a medieval Armenian kingdom centered on Lake Van, located in what is now eastern Turkey and northwestern Iran. It was named after Vaspurakan, a province of historic Greater Armenia. Ruled by the Artsruni dynasty, it competed and cooperated with the Bagratuni-ruled Kingdom of Armenia for a little over a century until its last king ceded the kingdom to the Byzantine Empire in 1021.
The Kingdom of Vaspurakan was ruled by the Artsruni dynasty, an ancient Armenian noble family. The Artsrunis had built up their power base in Vaspurakan in the 9th century, while Arab rule was waning the Bagratunis, were consolidating their control over Armenia. In 885, Ashot I Bagratuni received recognition as King of Armenia. In 908, during the reign of Ashot's successor Smbat I, Gagik I Artsruni was recognized as king by the Sajid ruler Yusuf and allied with the latter to attack the Bagratuni kingdom. After Smbat's death at the hands of Yusuf in 914, however, Gagik allied with the new Bagratuni king Ashot II to defeat the Arabs.
The Kingdom of Vaspurakan was at its zenith around 929 under the reign of Gagik I, who used the title of King of Armenia. He undertook a series of construction projects, particularly on Aghtamar, an island in Lake Van where one of his residences was located. Aghtamar also served as the residence of the Armenian Catholicos while Dvin was under Muslim control, allowing Gagik to influence the election of several catholicoi and further increase his legitimacy. At its greatest extent Vaspurakan comprised the lands between Lake Van and Lake Urmia (also known as Kaputan) in 908. It encompassed most of the historic provinces of Vaspurakan and Mokkʻ and, temporarily in the 910s, controlled parts of the provinces of Ayrarat, Taron and Korchaykʻ. The Kingdom of Vaspurakan had no specific capital. The court moved as the king transferred his residence from place to place – Van, Ostan/Vostan (modern Gevaş), Aghtamar and so on.
Although Gagik attempted to compete with Abas I Bagratuni in the 930s, he was eventually forced to accept the supremacy of the Bagratuni kingdom. Gagik died in 943 and was succeeded by his son Derenik-Ashot, who died without an heir in 953. He was succeeded by his brother Abusahl-Hamazasp, upon whose death the kingdom was divided among his three sons: Ashot-Sahak, Gurgen-Khachik and Senekerim-Hovhannes. The eldest brother, Ashot, retained the royal title and the suzerainty over his younger brothers. After Ashot's death Gurgen took the throne, bypassing the former's sons; Senekerim-Hovhannes became king in the same manner in 1003 following Gurgen's death.
Senekerim-Hovhannes married his daughter to Bagrat III of Georgia, seeking an alliance against the eastward expanding Byzantine Empire. In 1016, the kingdom was devastated by a raid by the Seljuq Turks. In 1021, King Senekerim-Hovhannes ceded the Kingdom of Vaspurakan to the Byzantine Empire, receiving Sebasteia and its territories extending to the Euphrates in return. Vaspurakan became the Byzantine province (theme) of Vasprakania or Media. In about 1050 Vasprakania was merged with that of Taron, but was conquered by the Seljuqs in 1054–1056.
After the Byzantine annexation, the Artsruni dynasty continued with Derenik, son of Gurgen-Khatchik, who became lord of Antzivazik by 1004 and had two brothers: Gugik and Ashot. King Senekerim-Hovhannes also had several children, among them David, Atom, Abushal and Constantine. There is a legend that one of Senekerim's daughter married Mendo Alao, an Alan who lived in Lusitania. David had a daughter that married King Gagik II of Ani.
Another branch of the family appeared in the person of in 1040, who had three children: Hasan, Djendjluk and Ishkhanik. Hasan had a son called Abelgharib who had a daughter that married Prince David, son of Gagik II.