Line 10 (Línia 10 in Catalan) is a rapid transit line of the Barcelona Metro network. A fully-automated line, it started operation on April 18, 2010. Part of the line is still under construction, with 17 stations currently in operation in Barcelona, Badalona and L'Hospitalet de Llobregat. The line is currently operated as two disconnected branches; the ZAL│Riu Vell – Collblanc section is known as L10 South (L10 Sud in Catalan) while the La Sagrera – Gorg portion is known as L10 North (L10 Nord in Catalan). The line's missing central section, expected to be completed by 2030, shares a significant portion of its tracks with Line 9.

The line will link the Zona Franca with Badalona, through Barcelona proper, sharing most of the area covered by L9. L9/10 will be the deepest and longest line in the network. Originally expected to be ready by 2008, ongoing problems with its construction are going to delay its completion until as late as 2025.

The line is currently operated in two sections, North and South, similarly to line 9.

The section from Gorg to Bon Pastor opened on 18 April 2010, and the section from La Sagrera to Bon Pastor (except Sagrera | TAV station) opened 26 June 2010. This section is operated as L10 Nord.

On 8 September 2018 the section between Foc station and the junction with the main route of line 9 at Can Tries Gornal opened to the public, with the exception of the stations Ciutat de la Justícia and Provençana. The opening of these two stations was deferred to 2019, with the rest of the line on the viaduct through the Zona Franca proper opening between 2020 and 2025. Trains on this section operate between Zona Franca and Collblanc stations, as the line from Collblanc to Zona Universitària is single track and does not have sufficient capacity for both L9 and L10 to run. This section is operated as L10 Sud.

Provençana station opened to the public on 2 March 2019 followed by Ciutat de la Justícia on 24 November 2019. The section between Foc and Zona Franca, with the exception of the Motors station, opened on 1 February 2020. On 7 November 2021, the section from Zona Franca to ZAL - Riu Vell opened to the public.

Station	Image	Location	Opened	Interchanges
Gorg		Badalona (Gorg)	18 April 2010
La Salut		Badalona	18 April 2010
Llefià		Badalona	18 April 2010
Bon Pastor		Barcelona (Bon Pastor)	18 April 2010
Onze de Setembre		Barcelona (Sant Andreu de Palomar)	26 June 2010
La Sagrera		Barcelona (La Sagrera)	26 June 2010

Station	Image	Location	Opened	Interchanges
Collblanc		L'Hospitalet	8 September 2018
Torrassa		L'Hospitalet	8 September 2018
Can Tries - Gornal		L'Hospitalet	8 September 2018
Provençana		L'Hospitalet	2 March 2019
Ciutat de la Justícia		L'Hospitalet	23 November 2019
Foneria		Barcelona (Zona Franca)	8 September 2018
Foc		Barcelona (Zona Franca)	8 September 2018
Zona Franca		Barcelona (Zona Franca)	1 February 2020
Port Comercial│La Factoria		Barcelona (Zona Franca)	7 November 2021
Ecoparc		Barcelona (Zona Franca)	7 November 2021
ZAL - Riu Vell		Barcelona (Zona Franca)	7 November 2021

• Avui article, part 1
• Avui article, part 2

41°26′27″N 2°14′02″E / 41.44083°N 2.23389°E / 41.44083; 2.23389