Mikael Tillström (born 5 March 1972) is a former tennis player and coach from Sweden.

He represented his native country as at the 2000 Summer Olympics in Sydney, where he was defeated in the third round by Switzerland's Roger Federer.

He reached his highest singles ATP-ranking on 14 October 1996, when he became world no.

His best performance at a Grand Slam came when he got to the quarterfinals of the Australian Open in 1996, defeating Aaron Krickstein, Christian Ruud, Patrick McEnroe and Thomas Muster and then losing to Michael Chang.

He is running the Good to Great Tennis Academy together with Magnus Norman and Nicklas Kulti, and he is currently coaching Gaël Monfils.