Baix Llobregat Nord, Natural subregion in Catalonia, Spain.

Baix Llobregat Nord is a subregion covering the northern third of the Baix Llobregat, from the Montserrat mountain and the Cairat gorge at Esparreguera to the Martorell gorge, following the Llobregat river. It comprises eight municipalities: Abrera, Castellví de Rosanes, Collbató, Esparreguera, Martorell, Olesa de Montserrat, Sant Andreu de la Barca and Sant Esteve Sesrovires, with Martorell as its economic centre.

The region received formal recognition in 1924 when J. Rendé included it in Catalonia's social agrarian organization plan. This early mapping helped establish the various towns and communities as a connected economic and geographic space.

The area corresponds roughly to the old archpriesthood of Montserrat and to the district of the Martorell court, telephone exchange and agrarian extension agency. Local festivals include the Misteris d'Olesa, La Passió in Esparreguera and Olesa, the Ball de Garlandes in Sant Esteve Sesrovires and the Festa dels Miquelets in Olesa.

Martorell serves as the main administrative center where visitors can access government offices and public services for the region. The fourteen municipalities are connected by roads that follow the valley terrain and mountain approaches.

The name Montserratí only took hold after the 2000 Roca Report, which proposed a new comarca with its capital at Martorell and fifteen municipalities. In 2017 the Plataforma El Montserratí és Comarca was presented with mayors and entities from eight municipalities, all of the current Baix Llobregat Nord except Sant Andreu de la Barca, plus El Bruc.