Daniela Ryf (born 29 May 1987) is a Swiss triathlete.

She is the titles holder of the Ironman World Championship of 2015, 2016, 2017, 2018 and 2021; and of the Ironman 70.3 World Championship of the 2014, 2015, 2017, 2018, and 2019.

[4][5][6] Ryf competed for Switzerland in the Triathlon at the Summer Olympics of 2008 (7th) and 2012 (40th).

[7] In 2010, Ryf placed third in the inaugural 2010 ITU Sprint Distance Triathlon World Championships.

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