Hélène Alexander Contostavlos-Nicolopoulo (6 August 1903 – 3 February 1963) was a French-born Greek tennis player.

She was a semifinalist at the 1925 French Championships, where she lost to the eventual champion, Suzanne Lenglen.

Contostavlos played in one major final in doubles at the 1923 World Hard Court Championships, finishing runner-up to Lenglen and Julie Vlasto while partnering with Daisy Speranza.

[1] Hélène Contostavlos was born on 6 August 1903 in Marseille to Julie Scaramanga and Alexander Contostavlos, both of whom were Greek.

She was a cousin of fellow tennis player Julie Vlasto.