Oona Kauste (born January 4, 1988 in Espoo) is a Finnish curler from Helsinki. She is currently the skip of the Finnish National Women's team.
Kauste has represented Finland in seven European Curling Championships. She was an alternate at her first European Championships in 2009. The team, skipped by Ellen Vogt placed 8th. She played second and as a skip at the 2011 European Curling Championships, placing 12th. She returned the following year playing third for Anne Malmi, placing 10th. She returned to the Euros at the 2013 European Curling Championships playing second for Puustinen. The team finished in 11th place, winning the B Division, and promoting Finland to the A Division of the 2014 European Curling Championships. There, the team finished with a 5–4 record, and a 6th-place finish. This qualified Finland for the 2015 World Women's Curling Championship. At the 2015 Worlds, the team finished with a 2–9 record, in 11th place.
Kauste took over as skip of the Finnish team in 2015, leading her team at the 2015 European Curling Championships. There, the rink finished with a 6-3 round robin record, in a tie for third place. In the semifinals, she lost to Scotland's Eve Muirhead, but rebounded to win the bronze medal against Denmark's Lene Nielsen. This qualified the team to play at the 2016 World Women's Curling Championship. They were less successful there, finishing with a 1–10 record, in 11th place.
Kauste skipped Finland at the 2018 Winter Olympics qualification event, but lost all six matches, failing to qualify her women's team for the Olympics.
Mixed doubles curling
Kauste and partner Tomi Rantamäki represented Finland at both the 2016 and 2017 World Mixed Doubles Curling Championship. In 2016, the pair won their group with a 6–0 record, and made it to the quarterfinals where they lost to Russia. They would eventually finish in 7th place. In 2017, they finished 5–2 in pool play, and again lost in the quarter finals, this time to the Czechs. They would again finish 7th. Their pair of seventh-place finishes would qualify the team to represent Finland in the 2018 Winter Olympics. There, they won just one game, and finished in last place.
Kauste also played at the 2012 European Mixed Curling Championship, playing lead for the Finnish team, skipped by her brother, Aku. There, she won a bronze medal.
Kauste works as a hairdresser and makeup artist, and owns her own salon. She attended the International Maker Academy and the Omnia Vocational College.