Vatnsfjörður (Icelandic pronunciation: [ˈvassˌfjœrðʏr̥]) is a nature reserve located north-west of Breiðafjörður on the Hjarðarnes coast of northwestern Iceland.

Hvammsfjördur located in the vicinity
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65°34′48″N 23°08′42″W / 65.58°N 23.145°W / 65.58; -23.145