Ildefons Cerdà is a railway station on the Llobregat–Anoia Line. It is not properly located in Plaça d'Ildefons Cerdà (a square in the Sants-Montjuïc district of Barcelona), but in the L'Hospitalet de Llobregat municipality, in Catalonia, Spain. The station is situated underneath Gran Via de les Corts Catalanes and was opened in 1987. It is served by Barcelona Metro line 8, Baix Llobregat Metro lines S3, S4 and S8, S9, and commuter rail lines R5, R6, R50 and R60.

The station has also become part of the Barcelona Metro line 10. The new station was officially opened on 23 November 2019 with the name Ciutat de la Justícia, since it is directly serving the Ciutat de la Justícia de Barcelona i l'Hospitalet de Llobregat buildings. The new station is located at a distance of 180 m from the existing Ildefons Cerdà station, without a direct connection (passengers have to exit to the road and walk on the street to move between the stations). However, it is considered in the official maps as an interchange node.

• Information and photos of the station at trenscat.cat (in Catalan)
• Video on train operations at the station on YouTube

Preceding station	FGC			Following station
Europa | Fira towards Molí Nou-Ciutat Cooperativa		L8		Magòria-La Campana towards Barcelona Pl. Espanya
Europa | Fira towards Can Ros		S33
Europa | Fira towards Olesa de Montserrat		S4
Europa | Fira towards Martorell Enllaç		S8
Europa | Fira towards Manresa Baixador		R5
Europa | Fira towards Igualada		R6
Europa | Fira towards Manresa Baixador		R50		Barcelona Pl. Espanya Terminus
Europa | Fira towards Igualada		R60
Preceding station	Metro			Following station
Foneria towards ZAL | Riu Vell		L10 Sud		Provençana towards Collblanc

41°21′39″N 2°07′49″E / 41.3608°N 2.13028°E / 41.3608; 2.13028