Pacific Bridge, Railway bridge in Palermo, Buenos Aires, Argentina

Puente Pacifico is a railway bridge in Buenos Aires that carries the San Martin line across the avenues Santa Fe and Juan B. Justo. The structure uses a metal framework to support train traffic between different areas of the neighborhood.

The Buenos Aires al Pacífico Railway built the bridge as part of extending its line to Retiro. Because the area near the Bosques de Palermo and the racetrack was already busy, the company chose an elevated route to avoid level crossings, constructing several bridges and promenades such as the Paseo de la Infanta. The Puente Pacífico is the most significant of these works owing to its location.

The bridge gives its name to Barrio Pacífico, a sub-area of Palermo running along Avenida Santa Fe from Plaza Italia to the Juan B. Justo crossing and parts of Avenida Luis María Campos. The Ferrocarril Buenos Aires al Pacífico, which built it, is the source of the name.

The bridge sits at the junction of Avenida Santa Fe and Avenida Juan B. Justo, where the Metrobús Juan B. Justo begins and Line D of the subway passes. The elevated Palermo station of the San Martín railway stands immediately beyond the bridge, so the area is a busy transport hub at most hours.

The 2011 widening of Avenida Santa Fe from 6 to 10 lanes lengthened the bridge eastward. Rather than moving the arch, engineers made an exact metal replica of the decoration on the straight section, so the characteristic arch now sits west of the bridge's centre.