Aleksandr Baldin (born August 31, 1984) is an Estonian former swimmer, who specialized in breaststroke events.

[1] He is a 15-time long-course Estonian swimming champion in the breaststroke (50, 100, and 200), and a member of SK Garant in Tallinn, under the tutelage of his personal coach Dmitri Kapelin.

Baldin also represented his nation Estonia in a breaststroke double at the 2004 Summer Olympics.

[2][3] In the 100 m breaststroke, Baldin raced to seventh place and forty-ninth overall on the third heat by half a second (0.50) behind Cyprus' Kyriakos Dimosthenous in 1:06.04.

[4][5] In the 200 m breaststroke, Baldin challenged seven other swimmers on the same heat, including Olympic veterans Ratapong Sirisanont of Thailand and Daniel Málek of the Czech Republic.