Diana Marcinkevica (born 3 August 1992) is a tennis player from Latvia.
Marcinkevica has won seven singles and 25 doubles titles on the ITF Women's Circuit.
On 28 April 2014, she reached her best singles ranking of world No.
196.
On 26 May 2014, she peaked at No.
146 in the doubles rankings.
Marcinkevica recorded her first win on the WTA Tour at the 2019 Baltic Open where she beat Kamilla Rakhimova 6–4, 6–3.
Playing for Latvia at the Fed Cup, she has a win–loss record of 23–24.