Line 5, currently known as Cornellà Centre – Vall d'Hebron, its termini, and often called "Línia Blava" (Blue line), is a rapid transit metro line belonging to the Barcelona Metro network operated by TMB, and part of the ATM fare-integrated transport network.

It opened in 1959 as the line 2 (originally). Line 5 is 18.8 km (11.7 mi) long and has 26 stations, from Cornellà to Vall d'Hebron in the northern part of Barcelona, where it meets L3.

• 1959 – Sagrera-Vilapicina section opened (as the former L2)
• 1967 – Vilapicina-Horta section opened (as the former L2)
• 1969 – Collblanc-Diagonal/Provença section opened.
• 1970 – Diagonal/Provença-Sagrera-Vilapicina section opened. The line then known as L2 integrated into L5.
• 1973 – Collblanc-Pubilla Cases section opened.
• 1976 – Pubilla Cases-Sant Ildefons section opened.
• 1983 – Sant Ildefons-Cornellà section opened.
• 2010 – Horta-Vall d'Hebron section opened.
• 2021 – Ernest Lluch station opened.

Municipality or District	Station	Opened	Connections
Cornellà de Llobregat	Cornellà Centre	1983	Rodalies de Catalunya: R1, R4 Trambaix: T1, T2
	Gavarra	1983
	Sant Ildefons	1976
L'Hospitalet de Llobregat	Can Boixeres	1976
	Can Vidalet	1976
	Pubilla Cases	1973
	Ernest Lluch	2021	Trambaix: T1, T2, T3
	Collblanc	1969	Barcelona Metro: L3, L9, L10
Sants-Montjuïc, Barcelona	Badal	1969
	Plaça de Sants	1965	Barcelona Metro: L1
	Sants Estació	1965	Renfe Operadora: AVE, Alvia, Euromed, Alaris, Talgo, TGV, Trenhotel (at Barcelona Sants) Renfe Media Distancia: R11, R12, R13, R14, R15, R16, 34 (at Barcelona Sants) Rodalies de Catalunya: R1, R2, R2 Nord, R2 Sud, R3, R4, RG1 (at Barcelona Sants) Barcelona Metro: L3
Eixample, Barcelona	Entença	1969
	Hospital Clínic	1969
	Diagonal	1969	Barcelona Metro: L3 FGC: L6, L7, S1, S2, S5, S6, S7 (at Provença)
	Verdaguer	1973	Barcelona Metro: L4
	Sagrada Família	1970	Barcelona Metro: L2
	Sant Pau | Dos de Maig	1970
Sant Martí, Barcelona	Camp de l'Arpa	1970
Sant Andreu, Barcelona	La Sagrera	1957	Renfe Media Distancia: R12 Rodalies de Catalunya: R3, R4 Barcelona Metro: L1, L4, L9, L10
	Congrés	1959
Nou Barris, Barcelona	Maragall	1959	Barcelona Metro: L4
Horta-Guinardó, Barcelona	Virrei Amat	1959
	Vilapicina	1959
	Horta	1967
	El Carmel	2010
	El Coll | La Teixonera	2010
	Vall d'Hebron	2010	Barcelona Metro: L3

• Official site for Transports Metropolitans de Barcelona
• Catalan Wikipedia article on the metro network

41°25′48″N 2°09′43″E / 41.430°N 2.162°E / 41.430; 2.162