Tamara Virgi Costache (born 23 July 1970) is an Olympic and former world record-holding freestyle swimmer from Romania.

Costache may be considered the earliest pioneer of specialised 50 freestyle sprinting for women.

[citation needed] She first set the world record for the 50 metre freestyle when competing at the Romanian National Championships in Bucharest on 16 July 1986.

Costache competed at the 1986 World Aquatics Championships, winning the gold medal in the 50 metre freestyle on 23 August in a world record time of 25.28 seconds.

[2] She competed in the 100 metre freestyle in Seoul also, but did no better than 8th place in the B Final with a time of 57.11 seconds.