Maria João Koehler, Portuguese tennis player
Maria João Koehler (born 8 October 1992) is a retired Portuguese tennis player.

Koehler has won three singles titles and four doubles titles on the ITF Circuit in her career. On 25 February 2013, she reached her best singles ranking of world No. 102. On 18 June 2012, she peaked at No. 151 in the doubles rankings.

Playing for the Portugal Fed Cup team, Koehler has a win–loss record of 11–20.