Fondo is a Barcelona Metro station in the municipality of Santa Coloma de Gramenet, in the northern part of the metropolitan area of Barcelona. It is served by two metro lines, L1 (red line), of which it is the northern terminus, and L9 (orange line). It was built in 1992 under Camí Fondo de Badalona, in the neighbourhood of Fondo (hence the name), between Carrer Dalmau and Carrer Verdi.
It began to serve L9 (orange line) on 13 December 2009, providing a transfer to the first part of Line 9 that was opened, which initially ran between Can Zam and Can Peixauet.