Kingisepp (Russian: Ки́нгисепп or Кингисе́пп), formerly Yamburg (Я́мбург), Yam (Ям), and Yama (Я́ма; Votic: Jaama), is a town and the administrative center of Kingiseppsky District of Leningrad Oblast, Russia, located along the Luga River 138 kilometers (86 mi) southwest of St. Petersburg, 20 kilometers (12 mi) east of Narva, and 40 kilometers (25 mi) south of the Gulf of Finland. Population: 48,488 (2010 Census); 50,295 (2002 Census); 49,954 (1989 Soviet census).

The town was first documented in 1384, when the Novgorodians under Patrikas built there a fortress against the Swedes. It was called Yama or Yamsky Gorodok, after the Izhorian (ethnic Finnic group) name Jaama. The environs of the town are still cited as the main location of speakers of the nearly extinct Izhorian language. The citadel withstood sieges by the Swedes in 1395 and by the Teutonic Knights during the 1444–1448 war.

The town became the most important economic center of the Vodskaya pyatina [ru] of the Novgorod Republic. There were 201 homesteads in the 15th century in the town; its total population can only be evaluated roughly based on the estimates of three to five persons per homestead. At the end of the Livonian War, it was ceded to Sweden, only to be returned twelve years later, in 1595.

Following the Treaty of Stolbovo, it again passed to the Swedes, who kept the name which in Swedish orthography became Jama or Jamo. The town was completely destroyed by Russian armies during the war of 1656–1658, after which only the citadel remained intact. The Swedes demolished the citadel in 1681. It is questionable whether the town, with its exclusively Russian population, ever recovered.

First held by the Russians for a month in late 1700, what was left of the citadel was finally taken by the Russians in the course of the Great Northern War in 1703. On May 14, 1703, Yam was renamed Yamburg (a German version of the name). Five years later, Peter the Great granted the town to Alexander Menshikov in his capacity of the Duke of Izhora. In the course of the administrative reform, Yamburg was included into Ingermanland Governorate (known since 1710 as Saint Petersburg Governorate). In 1780, Catherine the Great re-approved with some changes a previously existing coat of arms. Uyezd town status was granted to it in 1784.

Vladimir Lenin reportedly stayed in Yamburg in January 1919, when he ordered the Bolshevik troops to retake the town of Narva from Estonian forces. In October 1919, the anti-Bolshevist commander, General Nikolai Yudenich captured Yamburg, which marked the beginning of the push by the Northwestern White Army towards Petrograd. However, the Bolsheviks subsequently re-captured Yamburg on November 14, 1919. On November 16, 1919, the forces of General Yudenich were "crowded together in a small space near Yamburg" "in a serious state of disorganization", reported The New York Times.

The German form of the town name was retained until 1922, when the Bolsheviks renamed it in honor of the exiled Estonian Communist leader Viktor Kingissepp.

During World War II, Kingisepp was occupied by German troops from August 16, 1941 until February 1, 1944, when the 109th Rifle Corps captured the town, forcing the German 18th Army into new positions on the eastern bank of Narva.

In the beginning of the 20th century, Yamburg was the seat of Yamburgsky Uyezd of St. Petersburg Governorate (later known as Petrograd and Leningrad Governorate). On May 17, 1922, Yamburgsky Uyezd was renamed Kingiseppsky, simultaneously with the town.

On August 1, 1927, the uyezds were abolished and Kingiseppsky District, with the administrative center in Kingisepp, was established. The governorates were also abolished, and the district became a part of Leningrad Okrug of Leningrad Oblast. On July 23, 1930, the okrugs were abolished as well and the districts were directly subordinated to the oblast. Between March 22, 1935 and September 19, 1940, Kingisepp was the administrative center of Kingisepp Okrug of Leningrad Oblast, one of the okrugs abutting the state boundaries of the Soviet Union. After Kingisepp Okrug was abolished on September 19, 1940, Kingisepp became a town of oblast significance on December 17, 1940. In 2010, the administrative structure of Leningrad Oblast was harmonized with the municipal structure and Kingisepp became a town of district significance.

Within the framework of administrative divisions, Kingisepp serves as the administrative center of Kingiseppsky District. As an administrative division, it is, together with the village of Porkhovo, incorporated within Kingiseppsky District as Kingiseppskoye Settlement Municipal Formation. As a municipal division, Kingiseppskoye Settlement Municipal Formation is incorporated within Kingiseppsky Municipal District as Kingiseppskoye Urban Settlement.

The economy of Kingisepp is based on chemical, glass, and food industries. It is the location for the EuroChem Northwest ammonia plant which has the largest single-train production capacity in Europe, at 1 million tpy.

The railway connecting St. Petersburg with Tallinn passes through Kingisepp and has a railway station in it. There is infrequent suburban service to the Baltiysky railway station in St. Petersburg and to Ivangorod.

The A180 Highway, connecting St. Petersburg and Ivangorod, passes Kingisepp as well. It coincides with the European route E20 connecting St. Petersburg via Tallinn. Kingisepp is also connected by road with Volosovo and Slantsy.

Kingisepp contains thirteen cultural heritage monuments of federal significance and additionally seventeen objects classified as cultural and historical heritage of local significance. The federal monuments include the Yam Fortress, the Saint Catherine Cathedral, Kingisepp [ru] (by Antonio Rinaldi), and the complex of military barracks of the 19th century.

Kingisepp has a local history museum. It was open in 1960 and is located in the buildings of the St. Catherine Cathedral. In 1990, the cathedral was transferred to Russian Orthodox Church and the museum was closed until 1999, when it re-opened in the former building of the commercial school, an architecture monument.

Kingisepp is twinned with:

• Aleksei Ionov (1989), association football player
• Vera Karelina (1870–1931), labor activist and revolutionary
• Aleksandr Kerzhakov (1982), association football player
• Mikhail Kerzhakov (1987), association football player
• Pavel Mogilevets (1993), association football player
• Grigory Spiridonovich Petrov (1868–1925), politician
• Ivan Shpakov (1986), association football player
• Gustav Heinrich Johann Apollon Tammann (1861–1938), scientist

• Законодательное собрание Ленинградской области. Областной закон №32-оз от 15 июня 2010 г. «Об административно-территориальном устройстве Ленинградской области и порядке его изменения», в ред. Областного закона №23-оз от 8 мая 2014 г. «Об объединении муниципальных образований "Приморское городское поселение" Выборгского района Ленинградской области и "Глебычевское сельское поселение" Выборгского района Ленинградской области и о внесении изменений в отдельные Областные законы». Вступил в силу со дня официального опубликования. Опубликован: "Вести", №112, 23 июня 2010 г. (Legislative Assembly of Leningrad Oblast. Oblast Law #32-oz of June 15, 2010 On the Administrative-Territorial Structure of Leningrad Oblast and on the Procedures for Its Change, as amended by the Oblast Law #23-oz of May 8, 2014 On Merging the Municipal Formations of "Primorskoye Urban Settlement" in Vyborgsky District of Leningrad Oblast and "Glebychevskoye Rural Settlement" in Vyborgsky District of Leningrad Oblast and on Amending Various Oblast Laws. Effective as of the day of the official publication.).
• Законодательное собрание Ленинградской области. Областной закон №81-оз от 28 октября 2004 г. «Об установлении границ и наделении соответствующим статусом муниципального образования Кингисеппский муниципальный район и муниципальных образований в его составе», в ред. Областного закона №17-оз от 6 мая 2010 г «О внесении изменений в некоторые областные законы в связи с принятием федерального закона "О внесении изменений в отдельные законодательные акты Российской Федерации в связи с совершенствованием организации местного самоуправления"». Вступил в силу через 10 дней со дня официального опубликования (29 ноября 2004 г.). Опубликован: "Вестник Правительства Ленинградской области", №34, 19 ноября 2004 г. (Legislative Assembly of Leningrad Oblast. Oblast Law #81-oz of October 28, 2004 On Establishing the Borders of and Granting an Appropriate Status to the Municipal Formation of Kingiseppsky Municipal District and to the Municipal Formations Comprised By It, as amended by the Oblast Law #17-oz of May 6, 2010 On Amending Various Oblast Laws Due to the Adoption of the Federal Law "On Amending Various Legislative Acts of the Russian Federation Due to the Improvement of the Organization of the Local Self-Government". Effective as of after 10 days from the day of the official publication (November 29, 2004).).

• Media related to Kingisepp at Wikimedia Commons
• Official website (in Russian)
• Pictures of Kingisepp