Adelina Beljajeva (born 17 August 2003) is an Estonian rhythmic gymnast,[1] member of the national senior team.

[1] Beljajeva debuted internationally in 2018, competing at the European Championships in Guadalajara where she ended 9th in teams, 36th in the All-Around, 24th with hoop, 20th ball and 13th with clubs.

[3] In October she competed at the Youth Olympic Games in Buenos Aires, finishing 18th in the qualification round and not advancing to the final.

[5] In August she competed at the stage in Minsk taking the 53rd place in the All-Around, 53rd with hoop, 52nd ball, 31st with clubs and 38th with ribbon.

[8] In September she participated in the World Championships in Sofia, where she along with teammates Evelin Naptal, Mirtel Korbelainen, Kiara Oja, Arina Okamanchuk, Alina Vesselova was 20th in the All-Around, 15th with 5 hoops and 18th with 3 ribbons + 2 balls.