Hafnir
{{Infobox settlement
|official_name = Hafnir
|other_name =
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|settlement_type = Town
|motto =
|image_skyline = Hafnir 2024 2.jpg
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|image_caption = Hafnir
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|image_map = Reykjanesbaer map.png
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|map_caption = Location of the Municipality of Reykjanesbaer
|image_map1 =
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|map_caption1 =
|pushpin_map = Iceland
|pushpin_label_position = right
|pushpin_map_caption = Location in Iceland
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|subdivision_type = Country
|subdivision_name = {{flag|Iceland}}
|subdivision_type1 = Constituency
|subdivision_name1 = South Constituency
|subdivision_type2 = Region
|subdivision_name2 = Southern PeninsulaFormerly named Reykjanes
|subdivision_type3 = Municipality
|subdivision_name3 = 16px Reykjanesbær
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|unit_pref = Imperial
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|population_as_of = 2011
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|population_total = 109
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|population_blank1_title =Ethnicities
|population_blank1 =
|population_blank2_title =Religions
| timezone = GMT
| utc_offset = +0
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|coordinates = {{coord|63|56|N|22|41|W|region:IS|display=inline,title}}
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|website ={{official website|http://www.reykjanesbaer.is}}
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Hafnir ({{IPA|is|ˈhapnɪr̥}}) is a town in southwestern Iceland.
It is situated in the Reykjanes peninsula and has 109 inhabitants (as of 2011). The current population as of February 2024 is estimated to be 200-700.
In 1994 the inhabitants of Hafnir, Njarðvík and Keflavík agreed to form a municipality called Reykjanesbær with a population of 20,416 (July 2022).
A cabin in Hafnir abandoned between 770 and 880 provides the earliest known archaeological evidence of settlement in Iceland.{{cite journal|journal=Iceland Review Online|url=http://www.icelandreview.com/icelandreview/daily_news/A_New_View_on_the_Origin_of_First_Settlers_in_Iceland_0_378670.news.aspx|title=New View on the Origin of First Settlers in Iceland|date=4 June 2011|accessdate=1 July 2012|archive-url=https://web.archive.org/web/20110605235513/http://www.icelandreview.com/icelandreview/daily_news/A_New_View_on_the_Origin_of_First_Settlers_in_Iceland_0_378670.news.aspx|archive-date=5 June 2011|url-status=dead}}
In 1881, the American ship Jamestown ran aground off Hafnir with no one aboard. Its cargo of timber was salvaged and sold off. The ship's anchor is on display outside the village church.