Tanya Helen Oxtoby (born 15 June 1982) is an Australian soccer coach and former player, who is currently the manager of the Northern Ireland women's national team.

After finishing her playing career with Everton, she worked full-time as a coach with Notts County Ladies, as their Development Team Manager.

Oxtoby became the Head of Women's Football and Futsal at the University of Nottingham, to oversee the entire development pathway for Notts County Ladies.

[13] Oxtoby, who has dual English–Australian citizenship, joined Glory teammate Katie Holtham at Doncaster Rovers Belles for the 2012 FA WSL season.

[17] In August 2013, Oxtoby accepted a coaching role with the reserve team of WSL club Notts County Ladies,[18] before she returned to Australia.

[19] In 2017, Oxtoby was recruited by Birmingham City Ladies to become an assistant coach with a focus on out of possession with the first team in the Women's Super League.

Oxtoby was then recruited at the Talent Identification and Transition Manager for English Colleges Women's National Team, a position she held for two years.

[24][25] She managed to ensure Bristol's safety in the WSL in the following season, despite having the lowest budget of all the teams competing within the league, as well as a crippling injury list.

[30] On 1 September 2023, Oxtoby was officially appointed as the new manager of the Northern Ireland women's national team,[29][31] having signed a four-year contract with the Irish FA.