Sanni Marja Anniina Utriainen (born 5 February 1991) is a Finnish javelin thrower.

[1] Her father, Esa Utriainen, was Finnish champion in men's javelin throw in 1979 and represented Finland at the 1983 World Championships.

[3] At the 2010 World Junior Championships in Moncton Utriainen won gold, throwing a personal best 56.69 m on her final attempt to overtake Latvia's Līna Mūze by five centimetres.

[4] Later that summer she won gold at the Finnish championships in Kajaani, throwing 56.29 m for her first (and, as of 2015[update], only) national senior title; she also won at the Finland-Sweden Athletics International, setting a new personal best of 57.26 m.[3] In the following years Utriainen's results stagnated; although she improved her personal best in each of 2011, 2012 and 2013, the improvements were only minor, and she didn't reach the international elite.

[5] Utriainen broke 60 metres for the first time in June 2015 in Lappeenranta, throwing 60.08 m.[7] At the 2015 national championships in early August she only managed 57.59 m and placed second behind Oona Sormunen, but the following week she threw 63.03 m in Kuortane, improving her personal best by almost three metres and exceeding the qualifying standard for the World Championships in Beijing.