|County||Västra Götaland County|
|• Total||23.78 km2 (9.18 sq mi)|
(31 December 2019)
|• Density||1,954/km2 (5,060/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
Trollhättan (Swedish pronunciation: [ˈtrɔ̂lːˌhɛtːan] (listen)) is a city and the seat of Trollhättan Municipality, Västra Götaland County, Sweden, with 59,058 inhabitants in 2019. It is located 75 km north of Sweden's second-largest city, Gothenburg.
Trollhättan was granted city rights (which today have no legal effect) in 1916 at which time it had about 15,000 inhabitants, now grown to 59,058. Trollhättan was founded on the river Göta älv, at the Trollhättan Falls. The site was first mentioned in literature from 1413. Trollhättan had a strategic significance on the road between Västergötland and Norway. It was also of a commercial and political significance for shipping to and from Vänern.
Utilization of the power of the river was the first important business activities in the area. From the Middle Ages milling and sawing operations have been conducted where the city center is now located. For centuries, Trollhättan Falls was an obstacle for boats travelling the river, until a lock system was completed in the 19th century. It has since been updated several times, and the present locks were finished in 1916. In the late 19th century, hydropower was developed in Trollhättan. The Swedish energy corporation Vattenfall took its name from the falls in Trollhättan. Today the city has two operational hydropower stations, Olidan and Hojum. 
The name Trollhättan itself was originally used only for the fall area. The name Trollhättan is translated as "troll's bonnet". The latter part "hätta" could also mean mountain top. The water that splashed from a large rock at the bottom of the waterfall (before the hydro dam was built) was imagined to look like a troll's hat. Other former names of the site are Eiðar and Stora Edet; the latter lives on in the name of the south-bordering municipality of Lilla Edet.
The manufacturing company Nydqvist & Holm AB (now NOHAB) was based in the city of Trollhättan dating from 1847. Further industries quickly followed. Dating from the 19th century, Trollhättan formerly housed the headquarters and main production plant of Saab Automobile and now houses the headquarters and a production plant of National Electric Vehicle Sweden (NEVS). It also has a number of industrial facilities, headed by GKN Aerospace (previously known as Volvo Aero) and its contractual suppliers. As with parallel locations elsewhere in Europe, much of its production has moved from heavy industry to professional services and the creation of intellectual property.  
As of 2011 Trollhättan hosts a film production complex known as Trollywood; movies shot there include Show Me Love (Fucking Åmål), Dancer in the Dark, Melancholia, Dogville and studio scenes for Lilya 4-ever. The movie studio Film i Väst centered here produces about half of the Swedish feature-length films.
During the 17th century, work on a system of locks began and the first lock was completed around 1607 at Lilla Edet. During the 18th century several unsuccessful attempts were made to complete the locks. In 1718 a contract was signed by the government and Christopher Polhem (1661–1751) for construction of a canal between Kattegatt and Lake Vänern and from Vättern to the Baltic sea. Trollhätte Canal first begun construction in 1718. In 1800, Baltzar von Platen (1766–1829) completed the locks. Larger locks were later built under Nils Ericson (1802–1870). The further construction of the Göta Canal enabled larger boats to pass through Trollhätte Canal.  
Trollhättan Church (Trollhättans Kyrka) belongs to the Trollhättan congregation in the Diocese of Skara. Between 1860 and 1862, the New Trollhätte Canal Company (Nya Trollhätte Kanalbolag) built Trollhättan church. It was inauguration in 1862 and was handed over to the congregation as a gift. The church is erected in a neo-Gothic style after drawings by architect Adolf W. Edelsvärd (1824–1919). It consists of a longhouse with a north–south orientation. To the south is the tower with main entrance and to the north there is a polygonal cairn. It is located on a cliff in the Göta River in the middle of the canal system.
At the expense of the canal company, a sacristy was built in the north-west in 1896–1897 with a rise to the pulpit, and the same year came glass paintings designed by Folke Zettervall (1862–1955). The window paintings in the choir, which was installed in 1962, are done by artist Ralph Bergholtz (1908-1988). The church was restored in 1983–84 with Jerk Alton as architect. 
- "Tätorternas landareal, folkmängd och invånare per km2 2005 och 2010" (in Swedish). Statistics Sweden. 14 December 2011. Archived from the original on 27 January 2012. Retrieved 10 January 2012.
- "Trollhättan". Svenska Akademiens ordlista (in Swedish). Swedish Academy. 2015. Retrieved 16 September 2019 – via svenska.se.
- Thomas Bjurbäck. "Trollhättans historia". thomas.bjurback.se. Archived from the original on May 24, 2012. Retrieved December 1, 2019.
- "Olidan". powerplants.vattenfall.com. Retrieved December 1, 2019.
- "Hojum". powerplants.vattenfall.com. Retrieved December 1, 2019.
- "Trollhättan". vastsverige.com. Retrieved December 1, 2019.
- "Nohab. Nydqvist & Holm AB". svenska-lok.se. Retrieved December 1, 2019.
- "NEVS Launches New Trademark". myautoworld.com. Retrieved December 1, 2019.
- "Ny filmstudio, nytt kontor, nya filmer - Trollywood expanderar". filminstitutet.se. Retrieved December 1, 2019.
- "Trollhätte canal". kanaler.arnholm.nu. Retrieved December 1, 2019.
- "Christopher Polhem". Svenskt biografiskt lexikon. Retrieved December 1, 2019.
- "Baltzar Bogislaus von Platen". Svenskt biografiskt lexikon. Retrieved December 1, 2019.
- "Nils Ericson". bgf.nu. Retrieved December 1, 2019.
- "Adolf Wilhelm Edelsvärd". Svenskt biografiskt lexikon. Retrieved December 1, 2019.
- "Folke Zettervall". NE Nationalencyklopedin AB. Retrieved December 1, 2019.
- "Ralph Viktor Bergholtz". lexikonettamanda.se. Retrieved December 1, 2019.
- "Jerk Alton". wikidata.org. Retrieved December 1, 2019.
- World Championship Bandy 2017
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