Dzerzhinsk () is the second-largest city in Nizhny Novgorod Oblast, Russia, located along the Oka River, about east of Moscow and west of Nizhny Novgorod. Population: ; 218,630 at the 2021 census.
It was known as Rastyapino until being renamed in 1929. Dzerzhinsk has been described as the largest centre of the chemical industry in Russia, a distinction dating back to the Soviet era. The city is also a major site of Russian chemical weapons production.
History
Etymology and origins The area belonged to the historical district of Chernorechye (literally, "Black River country"), named for the peat-darkened water of its streams; a village on the site, Chernoye, is recorded from 1548, when it was granted to the Kirzhach Monastery among lands depopulated by the wars with Kazan. The settlement that grew into modern Dzerzhinsk is first documented separately, in 1606, as Rastyapino (), then belonging to the Dudin Monastery. Rastyapino grew after 1862, when a railway halt called Chyornoye opened nearby, prompting new housing to develop along the line; by 1900 the district had 13 small enterprises, chiefly sawmills, rope works and mills, employing around 1,700 people.
The First World War accelerated the settlement's industrial development. In 1915, to reduce Russia's reliance on foreign suppliers of munitions, chemical defence equipment and medicines, a mineral-acids plant — the future Korund — was founded near Rastyapino station, and a gunpowder works was relocated there from Petrograd, later becoming the Sverdlov Plant. Nationalized and expanded through the 1920s, the two plants drove rapid growth: the population of Rastyapino grew roughly fourfold over six years, from about 3,500 to 14,500 by 1929, by which point it was known as "new Rastyapino" to distinguish it from the older riverside settlement (which corresponds to the present-day village of Dachny). That year the settlement was chosen as the site of an entirely new socialist city built around the chemical industry; construction began with the clearing of a pine forest to lay out a central square, and on 22 June 1929 the settlement was renamed after Felix Dzerzhinsky, the first head of the Soviet Cheka (secret police). The foundation stone of the new town was laid on 7 November 1929. Before the war, residents marked 22 June itself as the city's birthday; the anniversary is now instead dated to 30 March 1930, when the Presidium of the All-Russian Central Executive Committee formally granted Dzerzhinsk city status.
Industrialization and the 1930s Even before official city status, Dzerzhinsk already had electricity, shops, a library, a hospital, clubs, schools, kindergartens and radio broadcasting, but housing could not keep pace with workers arriving from across the country: early arrivals lived in dugouts and then barracks, and permanent stone construction was slowed by shortages and poor workmanship. By January 1939 the city counted 103,415 residents, 104 multi-storey stone buildings, two Palaces of Culture, 50 libraries and 40 schools serving 24,000 children. A persistent transport gap between the residential town and its outlying factories was eased in 1933 by the opening of the first tram line, timed to the anniversary of the October Revolution. Industrially, the decade turned Dzerzhinsk into a major national producer of chemicals and explosives: contemporary local accounts credit it with supplying matches across Russia and producing roughly half of the country's TNT and most of its red phosphorus and cyanide alloy, alongside new plants Oka (later Sintez), Zavodstroy (renamed Caprolactam after the war), Zarya and Rulon (Orgsteklo), and the Igumnovo thermal power station, completed in 1939. The growth came under the shadow of the Great Terror. In 1937, nearly all the priests serving the surrounding villages were shot, and the district's churches were closed soon afterwards. The Trinity Church, absorbed into the city when the village of Chernoye became part of it, was shuttered in 1941 and demolished in 1966.
World War II Dzerzhinsk became a major centre of the Soviet chemical industry during the Great Patriotic War: by the end of 1941 chemical production accounted for 28.9 percent of all industry in Gorky Oblast, and the USSR's People's Commissariat of the Chemical Industry was evacuated to the city. Its plants were together credited with supplying up to half of all Soviet explosives. The Sverdlov Plant alone produced 148 million artillery shells and mines, 5.5 million aerial bombs, 5 million anti-tank mines and 2.8 million rockets for "Katyusha" launchers, and was awarded the Order of the Red Banner in 1945. The Orgsteklo plant (Factory No. 148) developed transparent armored canopies for Il-2, Yak-1 and La-5 aircraft; its lead engineer, Boris Zverev, received a Stalin Prize for the work. Factory No. 96 (Zavodstroy) meanwhile continued through the war to manufacture chemical-warfare agents alongside conventional explosives, detailed further below under "Chemical weapons production". Around 28,000 residents of Dzerzhinsk were drafted to the front, of whom nearly 9,800 were killed or went missing, while roughly 29,000 workers on the home front received awards for their wartime labour; in 1980 the city itself received the Order of the Red Banner of Labor in recognition of its wartime contribution. In 2021, in recognition of the same wartime record, Dzerzhinsk was named a City of Labour Valour by presidential decree, one of twelve Russian cities to receive the title that year.
Post-war development After the war, Dzerzhinsk's plants returned to civilian output and pioneered 76 new chemical processes nationally, including for phenol, acetone and caprolactam. The city was gasified in 1960, and by the 1970s and 1980s about 60 percent of its workforce was employed in the chemical industry, supported by ten local research and design institutes. A general plan adopted in 1973 guided construction of the southwestern Pribrezhny microdistrict and civic buildings including the House of Books and the Yubileiny and Rossiya cinemas. The collapse of the Soviet Union disrupted long-standing supply chains and left many chemical plants in crisis, a legacy the city continued to work through the 2000s and 2010s. The population subsequently fell from a peak of 285,071 at the 1989 census to 218,630 at the 2021 census and an estimated 213,410 in early 2025. Ethnic Russians made up 91% of the population at the 2010 census, with Tatars (2.6%), Ukrainians, Mordvins and other minorities accounting for the remainder.
Administrative and municipal status Within the framework of administrative divisions, it is, together with three work settlements and eleven rural localities, incorporated as the city of oblast significance of Dzerzhinsk—an administrative unit with a status equal to that of the districts. As a municipal division, the city of oblast significance of Dzerzhinsk is incorporated as Dzerzhinsk Urban Okrug.
Economy and industry As of the mid-2020s, about 45,500 people — some 44 percent of the city's industrial workforce — are employed directly in its factories; processing industries account for roughly 77 percent of output, of which chemicals make up 61 percent and plastics and rubber goods 13 percent, alongside a growing food-processing sector. Dzerzhinsk remains a major centre of Russia's chemical industry. During the Soviet period, the city was also one of Russia's principal production centres for chemical weapons. Owing to its chemical and munitions industries, Dzerzhinsk was, for much of the Soviet period, officially closed to foreign visitors.
Chemical weapons production Large-scale manufacture of chemical weapons began under Soviet government control in 1941, particularly concentrating on the production of lewisite, an arsenic-based blister agent, and yperite (mustard gas). The factory producing these substances was the wartime Zavodstroy (Factory No. 96), later renamed the Caprolaсtam (or Kaprolaktam) Organic Glass Factory and known today as Caprolactam JSC. In addition to these arsenic-based agents, prussic acid and phosgene were produced chiefly at the Rulon (Factory No. 148) and Chernorechensky plants. Phosgene was particularly significant historically: despite mustard gas's greater notoriety, it is estimated to have caused a majority of chemical-weapons fatalities in the First World War.
Production had in fact been planned well before the war: a directive of 10 July 1936 called for mustard-gas production capacity of 40,000 tonnes a year at Factory No. 96, with 20,000 tonnes to be reached by January 1938, and a Defense Committee decree of December 1939 ordered operational production units in place by January 1940. Production of yperite using the Levenstein process reached 2,933 tonnes in 1941 and 480 tonnes in 1942, before the plant converted to the Zaykov process; total wartime yperite production is put at around 47,600 tonnes, alongside roughly 15,900 tonnes of lewisite. Former workers reported repeated exposure to undiluted mustard gas with inadequate protective equipment, and 1,585 cases of occupational illness were recorded in the plant's specialised shops in 1942 alone.
Chemical weapons production at Dzerzhinsk officially ceased in 1965, although a local historical account dates a further period of lewisite and mustard-gas production at the Kaprolaktam plant to 1964–1966. Some materials were transferred to storage units, while large amounts of waste material—frequently containing high concentrations of arsenic—were buried in dumps on the site of the factory; researchers and former workers have reported that arsenic, chlorinated organic compounds, mercury and lead remain in the surrounding soil decades later. Full dismantling of the yperite facility was commenced in 1994. As of 1998, the lewisite production unit was still not completely disassembled.
Major enterprises
, Dzerzhinsk had 38 large industrial enterprises, which exported goods worldwide. About one thousand varieties of chemical products are produced in Dzerzhinsk. Major enterprises that, , operate or have operated in the city include: Sverdlov Plant, FSE (Federal State Enterprise), manufactures munitions, battle and industrial explosives, and chemicals for industrial purposes (phenol-formaldehyde resin, epoxy resin, carbamide-furane resin, plasticizers, hardeners of various modifications, nitrobenzene, sulphanole, acetic anhydride, various cleaners and detergents, as well as other products). The plant is included in the presidential list of the country's strategic enterprises. It is the city's largest industrial enterprise. On 20 October 2024 it was reported that the plant had been struck by Ukrainian drones. The extent of the damage to the plant was unclear. JSC Kristall Research Institute, a military explosives factory, part of the Sverdlow Plant, which suffered a serious explosion in June 2019. Korund, JSC (opened in 1915; reportedly the first factory in Russia to produce cyanide; remains in operation). This plant produces corundum for lasers and other applications. It is the oldest enterprise in Dzerzhinsk. In 2004, the plant was temporarily closed due to bankruptcy. Dzerzhinskhimmash, JSC (opened in 1941; makes distillation and column equipment, evaporators and heat exchangers). Sintez, JSC. Produces acetone, carbonyl iron, diethanolamine, isopropanol, methylamine, phenol, etc. Caprolactam, JSC (opened in 1939 as Plant No. 96; one of the largest Soviet producers of sulfur mustard and lewisite during the Second World War and the site of the first Soviet caprolactam production in 1949; incorporated into SIBUR-Neftekhim in 2011). Orgsteklo, JSC (previously manufactured specialist glass for the aeronautics market, currently specializes in production of acrylic co-polymers and organic glasses).