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{{Expand Chinese|topic=geo|date= June 2020}}

{{Infobox settlement
| name = Changhai
| native_name = {{nobold|{{lang|zh-hans|长海县}}}}
| other_name =
| postal_code_type = [[List of postal codes in China|Postal code]]
| postal_code = 116500
| area_code =
| settlement_type = [[County (People's Republic of China)|County]]
| image_skyline = Xiaoshuikou 小水口 in Xiaochangshan Island, Dalian.jpg
| image_caption = Xiaoshuikou (小水口) Scenic Area in Xiaochangshan Island
| image_map = File:ChinaDalianChanghai.png
| map_caption = Location of Changhai County in Dalian
| pushpin_map = China Liaoning
| pushpin_label = Changhai
| pushpin_label_position = 
| pushpin_map_caption = Location in Liaoning
| pushpin_mapsize =
| subdivision_type = Country
| subdivision_name = [[China|People's Republic of China]]
| subdivision_type1 = [[Province (China)|Province]]
| subdivision_name1 = [[Liaoning]]
| subdivision_type2 = [[Sub-provincial city]]
| subdivision_name2 = [[Dalian]]
| seat = No. 1 Changhai Square, Dachangshandao ({{lang|zh-hans|大长山岛镇长海广场1号}})
| area_footnotes = <ref name="stats yearbook">Dalian Statistical Yearbook 2012 ({{zh|s=《大连统计年鉴2012》|labels=no}}). Accessed 8 July 2014.</ref>
| area_total_km2 = 156.89
| population_footnotes = <ref>{{Cite web|url=https://www.citypopulation.de/en/china/liaoning/admin/|title = China: Liáoníng (Prefectures, Cities, Districts and Counties) – Population Statistics, Charts and Map}}</ref>
| population_total = 66,824
| population_as_of = 2020
| population_density_km2 = auto
| coordinates_footnotes = <ref>{{Google maps|url= https://www.google.com/maps/place/Changhai,+Dalian,+Liaoning,+China,+116500/@39.271783,122.5952398,15z/data=!3m1!4b1!4m2!3m1!1s0x3586ec518c2d65ff:0x58acc5dc713ac2ee |title= Changhai|accessdate= 2014-07-02}}</ref>
| coordinates = {{coord|39.272|122.595|type:adm3rd_region:CN-21|format=dms|display=it}}
| elevation_ft =
| elevation_m =
| timezone = [[China Standard Time|China Standard]]
| utc_offset = +8
| website = {{URL|www.changhai.dl.gov.cn}}
| blank_name_sec1 = Dalian district map
| blank_info_sec1 = {{Dalian districts}}
| blank_name_sec2 = [[Administrative division codes of the People's Republic of China#Division codes for statistic use|Division code]]
| blank_info_sec2 = 210224
}}

'''Changhai County''' ({{zh|s=长海县 |p=Chánghǎi Xiàn |l=Long-Sea County}}) is a county under the administration of [[Dalian]], [[Liaoning]] province, China. It consists of several islands in the [[Yellow Sea]] and is located offshore of the [[Liaodong Peninsula]]. There are 112 small islands and reefs in the county, traditionally called the '''Outer Long Mountains Island Chain''' ({{zh|links=no|s=外长山群岛|p=Wàichángshān Qúndǎo}}). The county has an area of {{convert|156.89|km2}} and a permanent population {{As of|2010|lc= y}} of 77,951, making it Dalian's least populous [[county-level division]],<ref name="stats yearbook"/> and the county government is located in the Dongshan neighborhood of the town of Dachangshandao ({{zh|s=大长山岛|l=Great Long-Mountain Island}}).

==Administrative divisions==
There are 5 [[Town (China)|towns]] in the county.<ref>{{cite web |url=http://www.xzqh.org/html/list/72.html |script-title=zh:大连市-行政区划网 |publisher=XZQH}}</ref>

Towns:
*[[Dachangshandao]] ({{lang|zh-Hans|大长山岛镇}})
*[[Zhangzidao]] ({{lang|zh-Hans|獐子岛镇}})
*[[Guangludao]] ({{lang|zh-Hans|广鹿岛镇}})
*[[Xiaochangshandao]] ({{lang|zh-Hans|小长山岛镇}})
*[[Haiyangdao]] ({{lang|zh-Hans|海洋岛镇}})

== Demographics ==
{| class="wikitable sortable"
!Census
!Population
|-
|2000
|99,532
|-
|2010
|77,951
|-
|2020
|66,824
|}

==Climate==

{{Weather box|width=auto
|metric first=y
|single line=y
|collapsed = Y
|location = Changhai, elevation {{convert|36|m|ft|abbr=on}}, (1991–2020 normals, extremes 1981–2010)
|Jan high C = -0.4
|Feb high C = 1.8
|Mar high C = 6.6
|Apr high C = 12.7
|May high C = 18.4
|Jun high C = 22.0
|Jul high C = 25.5
|Aug high C = 27.1
|Sep high C = 24.1
|Oct high C = 17.7
|Nov high C = 9.6
|Dec high C = 2.3
|Jan mean C = -3.7
|Feb mean C = -1.4
|Mar mean C = 3.1
|Apr mean C = 9.0
|May mean C = 14.4
|Jun mean C = 18.7
|Jul mean C = 22.6
|Aug mean C = 24.3
|Sep mean C = 21.1
|Oct mean C = 14.6
|Nov mean C = 6.4
|Dec mean C = -0.9
|Jan low C = -6.3
|Feb low C = -4.1
|Mar low C = 0.5
|Apr low C = 6.1
|May low C = 11.6
|Jun low C = 16.3
|Jul low C = 20.5
|Aug low C = 22.2
|Sep low C = 18.6
|Oct low C = 11.9
|Nov low C = 3.5
|Dec low C = -3.7
|Jan record high C = 9.5 |Jan record low C = -21.7
|Feb record high C = 11.3 |Feb record low C = -18.1
|Mar record high C = 17.8 |Mar record low C = -9.7
|Apr record high C = 22.3 |Apr record low C = -1.0
|May record high C = 28.9 |May record low C = 4.6
|Jun record high C = 34.5 |Jun record low C = 9.2
|Jul record high C = 35.4 |Jul record low C = 14.7
|Aug record high C = 33.4 |Aug record low C = 15.3
|Sep record high C = 31.7 |Sep record low C = 9.4
|Oct record high C = 26.4 |Oct record low C = -0.4
|Nov record high C = 19.4 |Nov record low C = -12.5
|Dec record high C = 13.0 |Dec record low C = -15.6
|year high C = |year low C =
|year high F = |year low F =
|precipitation colour = green
|Jan precipitation mm = 4.4
|Feb precipitation mm = 9.2
|Mar precipitation mm = 13.1
|Apr precipitation mm = 35.0
|May precipitation mm = 55.3
|Jun precipitation mm = 79.2
|Jul precipitation mm = 128.0
|Aug precipitation mm = 161.6
|Sep precipitation mm = 55.1
|Oct precipitation mm = 31.6
|Nov precipitation mm = 28.2
|Dec precipitation mm = 9.1
|Jan humidity = 57
|Feb humidity = 60
|Mar humidity = 63
|Apr humidity = 67
|May humidity = 73
|Jun humidity = 85
|Jul humidity = 89
|Aug humidity = 85
|Sep humidity = 73
|Oct humidity = 64
|Nov humidity = 61
|Dec humidity = 58
|unit precipitation days = 0.1 mm
|Jan precipitation days = 2.8
|Feb precipitation days = 3.1
|Mar precipitation days = 3.4
|Apr precipitation days = 6.2
|May precipitation days = 7.7
|Jun precipitation days = 8.8
|Jul precipitation days = 10.7
|Aug precipitation days = 8.5
|Sep precipitation days = 5.5
|Oct precipitation days = 5.5
|Nov precipitation days = 5.1
|Dec precipitation days = 3.4
|year precipitation days =
|Jan sun = 211.1
|Feb sun = 195.8
|Mar sun = 239.0
|Apr sun = 243.1
|May sun = 258.8
|Jun sun = 211.0
|Jul sun = 189.6
|Aug sun = 225.7
|Sep sun = 241.3
|Oct sun = 226.4
|Nov sun = 186.1
|Dec sun = 192.2
|year sun =
| Jan percentsun = 70
| Feb percentsun = 64
| Mar percentsun = 64
| Apr percentsun = 61
| May percentsun = 58
| Jun percentsun = 47
| Jul percentsun = 42
| Aug percentsun = 54
| Sep percentsun = 65
| Oct percentsun = 66
| Nov percentsun = 63
| Dec percentsun = 66
| year percentsun =
|Jan snow days = 4.1
|Feb snow days = 3.1
|Mar snow days = 2.1
|Apr snow days = 0.5
|May snow days = 0
|Jun snow days = 0
|Jul snow days = 0
|Aug snow days = 0
|Sep snow days = 0
|Oct snow days = 0.1
|Nov snow days = 1.6
|Dec snow days = 3.4
|year snow days =
|source 1 = [[China Meteorological Administration]]<ref name="cma graphical">{{cite web |url=http://data.cma.cn/data/weatherBk.html |script-title=zh:中国气象数据网 – WeatherBk Data |publisher=[[China Meteorological Administration]] |language = zh-hans |access-date=29 July 2023}}</ref><ref>
{{cite web|url=https://experience.arcgis.com/template/e724038fda394e9d9b7921f10fd1aa55/page/%E7%BA%AF%E8%A1%A8%E6%A0%BC%E7%BB%9F%E8%AE%A1-(%E5%AF%B9%E6%AF%948110%E5%8F%98%E5%8C%96)/?org=UQmaps |script-title=zh:中国气象数据网|publisher=[[China Meteorological Administration]] |language = zh-hans | access-date =29 July 2023}}</ref>
}}

==Transport==
*[[Changhai Dachangshandao Airport]]

==References==
{{reflist}}

==External links==
{{Commons category}}

{{County-level divisions of Liaoning}}
{{Dalian}}
{{authority control}}

[[Category:Islands of the Yellow Sea]]
[[Category:Island counties of China]]
[[Category:Districts of Dalian]]
{{liaoning-geo-stub}}

Changhai County - Revision history

imported>HarukaAmaranth: minor spacing fix