María Agustina Nieto Serra (born 15 May 1989)[1] is an indoor and field hockey player from Uruguay.

[2] Agustina Nieto was born and raised in Montevideo, Uruguay.

[3] Nieto made her debut for Las Cimarronas in 2008, at the South American Championship in Montevideo.

[5] In 2019, she was a member of the team at the Pan American Games in Lima.

[6] Agustina Nieto made her debut for the Uruguayan indoor team at the 2010 Indoor Pan American Cup, where she won a silver medal.