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{{Infobox kommune
| name               = Gjerdrum
| native_name        =
| native_name_lang   =
| other_name         =
| official_name      =
| idnumber           = 3230
| image_skyline      = Gjerdrum i Akershus.jpg
| county             = Akershus
| district           = Romerike
| capital            = [[Ask, Akershus|Ask]]
| demonym            = Gjermsokning
| language           = [[Bokmål]]
| coatofarms         = Gjerdrum komm.svg
| munwebpage         = www.gjerdrum.kommune.no
| mayor              = Anders Ostensen<ref>{{Cite news|url=https://www.nytimes.com/2021/01/04/world/europe/norway-landslide.html|title=Rescuers Search for Survivors in Norway Landslide That Killed at Least 7|newspaper=The New York Times|date=4 January 2021|last1=Libell|first1=Henrik Pryser|last2=Kwai|first2=Isabella}}</ref>
| mayor_party        = Labor Party<ref>[https://www.arbeiderpartiet.no/ordforere/54979-anders-stensen Anders Østensen | Profil] {{Webarchive|url=https://web.archive.org/web/20210422194646/https://www.arbeiderpartiet.no/ordforere/54979-anders-stensen |date=2021-04-22 }}, ''Arbeiderpartiet.no''</ref> 
| mayor_as_of        = 2011<ref>[https://www.gjerdrum.kommune.no/publisert-innhold/politikk-og-organisasjon/ordforer-og-varaordforer/ Ordfører i Gjerdrum kommune] {{Webarchive|url=https://web.archive.org/web/20210108205826/https://www.gjerdrum.kommune.no/publisert-innhold/politikk-og-organisasjon/ordforer-og-varaordforer/ |date=2021-01-08 }}, ''Gjerdrum.kommune.no''</ref><ref>[https://www.rb.no/lokale-nyheter/anders-ostensen-blir-gjerdrum-ordforer/s/1-95-5759779 Anders Østensen blir Gjerdrum-ordfører], ''Romerikes Blad'' (October 5, 2011)</ref><ref>[https://www.rb.no/valg2015/valg-gjerdrum/nyheter/forste-gjenvalg-pa-32-ar/s/5-43-156796 Første gjenvalg på 32 år], ''Romerikes Blad'' (October 15, 2015)</ref><ref>[https://www.rb.no/sp-skred-pa-romerike-disse-kan-bli-ordforere/s/5-43-1136062 Resultater etter kommunevalget i Gjerdrum], ''Romerikes Blad'' (September 9, 2019)</ref>

| area_rank          = 396
| area_total_km2     = 83
| area_land_km2      = 82
| area_water_percent = 0.03
| population_as_of   = 2013
| population_rank    = 192
| population_total   = 6267
| populationpercent  = 0.11
| population_density_km2= 60
| population_increase= 31.6
| coordinates        = {{coord|60|4|57|N|11|0|52|E|region:NO|display=inline,title}}
| utm_zone = 32V | utm_northing = 6662335 | utm_easting = 0612078 | geo_cat = adm2nd
}}

'''Gjerdrum''' ({{IPA|no|ˈjæ̀rdrʉm|lang}}) is a [[Municipalities of Norway|municipality]] in [[Akershus]] [[Counties of Norway|county]], [[Norway]].  It is part of the [[Districts of Norway|traditional region]] of [[Romerike]].

Gjerdrum borders the municipalities of [[Nannestad]], [[Nittedal]], and [[Ullensaker]], and [[Lillestrøm]]. The administrative centre of the municipality is the village of [[Ask, Akershus|Ask]].

==Name and coat of arms==
The municipality (originally the [[parish]]) is named after the old Gjerdrum farm ([[Norse language|Norse]] ''Gerðarvin''). The first element is the [[genitive]] of a river name ''Gerð'' and the last element is ''vin'' '[[meadow]], [[pasture]]'. The river name is derived from the Norse word ''garðr'' meaning '[[fence]]' and so the meaning is 'the river whose function is a fence (or as a border)'.

The [[coat of arms]] is from modern times. They were granted in 1993. The arms show a traditional Norwegian form of [[roundpole fence]]. The arms are also [[canting arms|canting]] because the name of the municipality refers to a fence.<ref>{{cite web|url=http://www.gjerdrum.kommune.no/Modules/theme.aspx?ObjectType=Article&ElementID=5079&Category.ID=10737 |title=Om kommunevåpenet i Gjerdrum |publisher=Gjerdrum kommune |access-date=2008-12-18 |language=no |url-status=dead |archive-url=https://web.archive.org/web/20110724182051/http://www.gjerdrum.kommune.no/Modules/theme.aspx?ObjectType=Article&ElementID=5079&Category.ID=10737 |archive-date=2011-07-24 }}</ref>

==History==
Gjerdrum was established as a municipality on 1 January 1838 (see [[formannskapsdistrikt]]).

[[Store norske leksikon]] says that artefacts indicate that humans have lived in Gjerdrum since [[Ancient history|ancient times]]; furthermore the names of places also indicate the same.<ref>https://snl.no/Gjerdrum "Gjerdrum var tidlig bosatt, noe både oldtidsfunn og stedsnavnene vitner om"</ref>

===2020 landslide===
{{Main|2020 Gjerdrum landslide}}
On 30 December 2020 a [[quick clay]] [[landslide]] occurred in the village of Ask<ref>[https://www.smp.no/ntb/innenriks/2021/01/01/Helsevesenet-om-Gjerdrum-skredet-%E2%80%93-Vi-har-fortsatt-tro-p%C3%A5-%C3%A5-finne-overlevende-23251825.ece Helsevesenet om Gjerdrum-skredet: – Vi har fortsatt tro på å finne overlevende] ''tr. "The health service about the Gjerdrum landslide: - We still believe in finding survivors"'' 1 January 2021 ''www.smp.no'', accessed 2 January 2021</ref> within Gjerdum municipality. 10 people died.<ref>[https://www.vg.no/nyheter/innenriks/i/R96ozr/en-person-funnet-doed-i-skredomraadet Én person funnet død i skredområdet] ''tr. "One person was found dead in the landslide area"'' 1 January 2021 ''www.vg.no'', accessed 2 January 2021</ref> The slide measured {{convert|700|by|300|m}}, injured 10 people (including one seriously), left 10 unaccounted for and led to 1,000 being evacuated from the village, with several homes having been destroyed in the slide.<ref name=bbc-gjerdrum-landslide>{{Cite news|title=Norway landslide: Houses buried in Gjerdrum village near Oslo|url=https://www.bbc.com/news/world-europe-55484627|date=30 December 2020|access-date=30 December 2020|publisher=[[BBC News]]}}</ref>

==Geography==

Gjerdrum lies on the southwestern part of the [[Romerike Plain]] (''Romerikssletta''); this eastern part of the municipality lies at a low altitude and is covered by significant<ref>https://snl.no/Gjerdrum "Gjerdrum omfatter den sørvestre del av Romerikssletta. Denne østlige delen av kommunen er lavtliggende og dekket av mektige lag leire som ble avsatt i havet mot slutten av siste istid"</ref> layers of clay that was deposited, towards the end of the previous ice age.

The quick-clay at Gjerdrum was deposited (in a [[fjord]])<ref>https://www.dn.no/innlegg/gjerdrum/geologi/offentlig-forvaltning/innlegg-hvem-skal-gi-tillatelse-til-bygging-pa-farlig-grunn/2-1-938506 "Knut Bjørlykke, professor i geologi ved Universitetet i Oslo" [...]</ref> around 8,000 or 9,000 years ago, when the sea level was around 200 meters higher.

==Demographics==

In 2021, 1258 inhabitants were immigrants or Norwegian-born to immigrant parents. 264 inhabitants had Polish parents or were Polish themselves; 173 had Lithuanian parents or were Lithuanian.<ref name=":0">{{Cite web|title=09817: Immigrants and Norwegian-born to immigrant parents, by immigration category, country background and percentages of the population (M) 2010 - 2021|url=http://www.ssb.no/en/statbanken/statbank/table/09817/|access-date=2021-07-07|website=PX-Web SSB|language=en}}</ref>

{| style="float: center;" class="wikitable"
<!--|+ '''Number of minorities (1st and 2nd generation) in Gjerdrum by country of origin in 2015'''-->

|-
! style="background:#efefef;"|Ancestry
! style="background:#efefef;"|Number<ref name=":0" />
|-
| {{flag|Poland}}||264
|-
| {{flag|Lithuania}}||173
|-
| {{flag|Sweden}}||70
|-
|{{flag|Pakistan}}
|67
|-
|{{flag|Philippines}}
|56
|-
| {{flag|Iraq}}||43
|-
|{{flag|Denmark}}
|35
|-
|{{flag|Thailand}}
|35
|-
|{{flag|Latvia}}
|34
|-
|{{flag|Syria}}
|30
|-
|{{flag| Trinidad and Tobago}}
|3
|}

==Sports==
The local sports team is [[Gjerdrum IL]].

== People from Gjerdrum ==

* [[Christian Krohg (government minister)|Christian Krohg]] (1777–1828) politician, cabinet member, [[Member of parliament|MP]]<ref>{{Cite web|url=https://nbl.snl.no/Christian_Krohg_-_1|title = Christian Krohg - 1|date = 25 February 2020}}</ref>
* [[Olaf Devik]] (1886 in Gjerdrum – 1987) meteorologist and physicist <ref>{{Cite web|url=https://snl.no/Olaf_Martin_Devik|title = Olaf Martin Devik|date = 26 February 2020}}</ref><ref>{{Cite web|url=https://nbl.snl.no/Olaf_Devik|title = Olaf Devik|date = 25 February 2020}}</ref>
* [[Daniel Franck]]  (born 1974) a snowboarder, silver medallist in the men's halfpipe in the [[1998 Winter Olympics]]
* [[Petter Fagerhaug]] (born 1997 in Gjerdrum) cross-country mountain biker
* [[Kristoffer Skjerping]] (born 1993) a former road racing cyclist, lives in Gjerdrum
* [[Helene Spilling]] (born 1996), a professional dancer

== Gallery ==
<gallery mode=packed>
File:Gjerdrum kirke2.JPG|Gjerdrum kirke
File:Gjerdrumungdomsskole.JPG|Gjerdrum ungdomsskole
File:Akershus IMG 8670 Kråkfoss.JPG|River Leira by Kråkfoss waterfalls
</gallery>

==References==
{{Reflist}}

==External links==
*{{commons category-inline|Gjerdrum}}
*{{wiktionary-inline|Gjerdrum}}
*[https://web.archive.org/web/20071001003746/http://www.ssb.no/english/municipalities/0234 Municipal fact sheet] from [[Statistics Norway]]
*{{Wikivoyage inline|Akershus}}
*[http://www.gilfotball.no GIL football] {{in lang|no}}

{{Geographic location
|Centre    = Gjerdrum
|North     =  [[Nannestad]]
|Northeast =  
|East      =  [[Ullensaker]]
|Southeast =  [[Lillestrøm]]
|South     =  [[Lillestrøm]]
|Southwest =  
|West      =  [[Nittedal]]
|Northwest =  
}}
{{Akershus}}
{{Authority control}}

[[Category:Gjerdrum| ]]
[[Category:Municipalities of Akershus]]