Sini Karjalainen

Sini Karjalainen is a Finnish ice hockey player for Skellefteå AIK of the Swedish Women's Hockey League and a member of the Finnish national team. She played college ice hockey at Vermont.

International play

Karjalainen played with the Finnish women's national U18 team at the IIHF World Women's U18 Championships in 2015, 2016, and 2017.
She was officially named to the Finnish roster for the 2020 IIHF Women's World Championship on 4 March 2020, before the tournament was cancelled on 7 March 2020 due to public health concerns related to the COVID-19 pandemic. The 2020 World Championship would have been Karjalainen's debut with the Finnish national team at an IIHF-organized international tournament; she appeared on the national roster for various Euro Hockey Tour tournaments, first in 2016.
She ultimately debuted with the senior national at the 2021 IIHF Women's World Championship as an alternate defenseman on the 25-player roster and skated in five games.
On 2 January 2026, she was named to Finland's roster to compete at the 2026 Winter Olympics.