Heather O'Brien (born 22 July 1984) is a female Irish rugby union player.

She was in Ireland's 2014 Women's Rugby World Cup squad.

[1] She scored a try in Ireland's victory over the Black Ferns at the 2014 World Cup.

[citation needed] O'Brien studied Physical therapy at Queen Margaret University.

[4] She was awarded the Evening Echo Ladies Sportstar of the Month for August 2014.