Fabiana Gisela Vallejos (born 30 July 1985) is an Argentine footballer who plays for Chilean club Coquimbo Unido [es] as a midfielder.

[1] In 2024, she moved to Chile and joined Coquimbo Unido [es] in the top division.

She also participated at the 2003 Dominican Republic Pan American Games, the 2003 and the 2006 Sudamericano Femenino.

She won the 2006 title with the Argentine team, defeating continental rivals Brazil for the first time ever.

Vallejos also played all three of Argentina's matches at the 2007 FIFA Women's World Cup in China.