Montserratí, Historical subregion in Barcelona Province, Spain.

Montserratí is a natural region on the south-eastern flank of the Montserrat massif, named after the mountain. Its core is the Pla de Montserrat, a sunken fragment of the Prelitoral depression crossed by the Llobregat, which runs between the Cairat gorge at Esparreguera and the Congost between Martorell and Sant Andreu de la Barca. Its bounds are the Coll del Bruc to the north, the Serra d'Ordal to the south and the Anoia valleys to the west.

The name Montserratí is not a historical designation but a recent identity label, spread mainly among younger generations of Baix Llobregat Nord. In the 1930s administrative division of Catalonia the territory was split among several comarques, most municipalities falling into today's Baix Llobregat Nord. The geographer Pau Vila, responsible for the 1936 comarcal division, considered a separate comarca around the Pla de Montserrat with its capital at Martorell, and the 2000 Informe Roca, commissioned by the Parliament of Catalonia, again proposed this solution.

The name Montserratí is recent, not historical, yet it now drives local identity: the Colla Bastonera del Montserratí, the Marxa del Montserratí organised by the Club Excursionista d'Esparreguera, and the annual Fira del Montserratí all use it. In December 2021, TV3's Joc de cartes dedicated an episode to the best restaurant with history in the Montserratí, with four establishments from Collbató, Castellví de Rosanes, Esparreguera and Sant Esteve Sesrovires.

Regular trains from Barcelona's Plaça España station connect to Martorell, making the region easily accessible for day trips or stays. Services run several times daily with travel taking around 30 to 45 minutes depending on the service type.

One of Catalonia's native olive varieties, the vera del Montserratí, grows around the massif, especially in Collbató and El Bruc. The name Montserratí is recent rather than historical, spread by younger generations and carried today by the Colla Bastonera del Montserratí, the Marxa del Montserratí race and the annual Fira del Montserratí.