Katriin Saar (born 11 March 2002) is an Estonian tennis player.

Saar made her Fed Cup debut for Estonia in 2018.

Saar has a career-high ITF juniors ranking of 186, achieved on 21 May 2018.

[1] Saar made her Fed Cup debut for Estonia in 2018, while the team was competing in the Europe/Africa Zone Group I, when she was 15 years and 334 days old.

This biographical article relating to Estonian tennis is a stub.