Siofra Mary O'Brien (born 22 February 2000)[1] is an Irish field hockey player.

She also appeared at the EuroHockey Junior Championship in Valencia, where the team finished in seventh place.

[8] In 2022, O'Brien made her senior international debut at the FIH World Cup held in Amsterdam and Terrassa.

[9][10][11] She was initially listed as a reserve player, however was called into action following an injury to Caoimhe Perdue.

This biographical article relating to an Irish field hockey figure is a stub.