Martti Aljand (born 22 November 1987 in Tallinn) is an Estonian individual medley and breaststroke swimmer.
At 2008 Summer Olympics he finished 45th in 100 m breaststroke with national record and 46th in 200 m breaststroke.
He is 33-time long course and 43-time short course Estonian swimming champion. He has broken 58 Estonian records in swimming.
His older sisters Triin and Berit are also a swimmers. His father Riho is a swimming coach, and his grandmother, Ulvi Voog (Indrikson), is a former Olympic swimmer.
He is married to another Estonian swimmer Annika Saarnak, they have a daughter.