Semey
City on the Irtysh, former nuclear test site and regional capital.
Semey, formerly known as Semipalatinsk until 2007 and as Alash-Qala from 1917 to 1920, is a city in northeastern Kazakhstan, situated within the Kazakh portion of Siberia. It lies along the Irtysh River near the Russian border, north of Almaty and southeast of Omsk. Since the creation of Abai Region in 2022, Semey has served as its administrative center. The city’s population is recorded at 312,764.
The area’s first Russian settlement was a fort built in 1718 beside the Irtysh, near the ruins of an ancient Buddhist monastery where seven buildings were visible. The fort was named Semipalatinsk, meaning "Seven-Chambered City" in Russian, after this monastery. Frequent flooding from snowmelt prompted a relocation upstream in 1778. A small city grew around the new fort, primarily serving river trade between Central Asian nomads and the Russian Empire. The Turkestan-Siberia Railway, completed in the early 20th century, elevated the city’s importance as a transit hub. On 19 May 1854, it became the capital of Semipalatinsk Oblast. Between 1917 and 1920, the city was the capital of the short-lived Alash Autonomy and was called Alash-Qala. Red Army forces took control in 1920. It later served as an administrative center for various oblasts until 1997, when Semipalatinsk Oblast merged with East Kazakhstan Region.
During World War II, a Polish diplomatic post operated in the city from October 1941 to July 1942. In 1949, the Soviet Union established the Semipalatinsk Test Site west of the city, where 456 nuclear tests (340 underground, 116 atmospheric) were conducted until 1989. The secret city of Kurchatov, named for Igor Kurchatov, housed leading Soviet weapons scientists. The testing caused severe environmental and health consequences, including high rates of cancer, childhood leukemia, and birth defects in nearby villages. The city’s name was changed to Semey in 2007, with officials citing the negative associations of the old name with atomic testing. In March 2022, President Tokayev selected Semey as the prospective capital of the new Abai Region, which officially formed on 8 June 2022. The city held its first mayoral election on 12 October 2025.
Semey has a cold semi-arid climate with warm summers and very cold winters. Precipitation is low year-round except for July. The lowest recorded temperature was in November 1910, and the highest in August 2002. The city
- location
- North-eastern Kazakhstan, on the Irtysh River
Lore & Background
Situated in northeastern Kazakhstan within the Kazakh part of Siberia, Semey lies along the Irtysh River near the Russian border. The city originated from a Russian fort built in 1718 beside the river, near the ruins of an ancient Buddhist monastery where seven structures were visible, giving the settlement its original name, Semipalatinsk, meaning "Seven-Chambered City" in Russian. Frequent flooding from snowmelt forced the fort to be relocated upstream in 1778. A small city grew around the relocated fort, serving river trade between Central Asian nomads and the Russian Empire. Its importance increased with the early 20th-century construction of the Turkestan-Siberia Railway, making it a major transit hub. From 1917 to 1920, during the Alash Autonomy, it was called Alash-Qala and served as that state’s capital. The city later became the administrative center of the newly created Abai Region in 2022. A defining characteristic is its proximity to the former Semipalatinsk Test Site, where the Soviet Union conducted 456 nuclear tests between 1949 and 1989, resulting in environmental and health consequences for the surrounding area. Modern Semey is a university town with a population over 350,000, noted for its Russian character due to its border location and scientific community.
Reader's Guide
Semey, formerly known as Semipalatinsk, is a city in northeastern Kazakhstan that became the administrative center of the newly created Abai Region in 2022. Its history began in 1718 when Russia built a fort near the ruins of an ancient Buddhist monastery with seven visible buildings, naming the settlement after those structures. The original fort suffered frequent flooding from snowmelt and was relocated upstream in 1778. The city grew as a river trade hub between Central Asian nomads and the Russian Empire, and its importance increased with the construction of the Turkestan-Siberia Railway. Between 1917 and 1920, it served as the capital of the short-lived Alash Autonomy and was called Alash-Qala. During World War II, a Polish diplomatic post operated there from 1941 to 1942. From 1949 to 1989, the nearby Semipalatinsk Test Site hosted 456 nuclear tests, including 116 atmospheric detonations. The resulting fallout and uncontrolled exposure have caused high rates of cancer, childhood leukemia, and birth defects among residents of neighboring villages. Modern Semey is a bustling university town with a more Russian character than other Kazakh cities, owing to its proximity to Russia and its large scientific community attached to the former test site labs and the university. The city is home to the Museum of F. M. Dostoevsky, the only one of seven such museums located outside Russia, and a museum dedicated to the poet Abai Qunanbaiuly. A suspension bridge across the Irtysh River, opened in 2000, connects the two major parts of the city.
Did You Know?
- The Museum of F. M. Dostoevsky in Semey is the only one of seven Dostoevsky museums located outside Russia.
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