Katrín Tanja Davíðsdóttir (Icelandic pronunciation: ?['k?a?trin 'ta?viðs?tou?t?r?]; born 10 May 1993) is an Icelandic CrossFit athlete known for her seven appearances at the CrossFit Games.
She is the women's champion of the 2015 and 2016 CrossFit Games.
Katrín is the second woman to repeat as champion, following in the footsteps of her countrywoman, 2011 and 2012 CrossFit Games champion Anníe Þórisdóttir.