The Llobregat (Catalan pronunciation: [ʎuβɾəˈɣat]) is the second longest river in Catalonia, Spain, after the Ter.

[2] The Llobregat originates at an elevation of 1,259 metres (4,131 ft) in the Serra del Cadí, within the limits of Castellar de n'Hug municipality, Berguedà comarca.

At Martorell, the Roman Via Augusta crosses the river on the Devil's Bridge, which dates from the High Middle Ages in its current form.

The delta provided a large extension of fertile land close to the city of Barcelona, but is now largely paved, urbanized and covered by infrastructure such as the Barcelona–El Prat international Airport.

[3] The Llobregat is heavily managed in its lower course and water that was previously lost to the sea is now pumped upstream to increase the natural flow, recharge the river delta wetlands and control seawater incursion.