Gualba is a municipality in Catalonia, Spain. Belonging to the province of Barcelona.

In the region of Vallès Oriental. According to 2008 data its population was of 1,126 inhabitants. It includes the towns of La Barceloneta, Can Plana, Estació, Gualba de Dalt, Gualba de Baix, La Llobregosa and Royal Parc. It is located at the foot of the Montseny massif. 
Location 41 ° 43'56 "N 2 ° 30'17" E Coordinates: 41 ° 43'56 "N 2 ° 30'17" E (map)
• Altitude 177 Msnm
Area 23.3 km²
kernels of
population July
Population 1,481 (2018)
• Density 61.07 hab / km²
Gentilicio gualbencs
Postcode 08474

It is cited in 1053 documents as Aqua Alba. In 1083 it became part of the possessions of the monastery of Sant Cugat. Part of the jurisdiction was left to the Gualba family.

The parish church is dedicated to Sant Llorenç. Consecrated in 1099, it still has the Romanesque apse and façade. In the 15th century, a Gothic-style side chapel was extended, as well as the bell tower. Inside are several tombstones, as well as a 16th-century altarpiece with scenes from the life of Saint Vincent. There are also some pieces of jewelry from the 16th and 18th centuries.

Gualba celebrates its festival in the month of August.

Traditionally, the main activity was agriculture, emphasizing the crops of cereals, potatoes and legumes. However, its proximity to Sant Celoni has caused many of its inhabitants to move to this town for work.

Gualba has also seen an increase in tourist activity and the homes used as second homes, thanks to its location very close to Montseny. There is also a camping area managed by the Environmental Park of Gualba.
The municipality of Gualba, of 23.24 Km2, occupies the extreme NE of the region of Vallès Oriental and its border with the municipal district of Riells i Viabrea marks the regional limit. It is located at an altitude of 177 meters above sea level and borders on the NE with Riells and Viabrea, on the SE with Batllòria and Tordera, on the NO with Fogars de Montclús i Campins and on the SW with Sant Celoni.

The hydrographic axis is the Gualba stream, which is born at the source of Briançó, passes through the Santa Fe valley and ends at the Tordera, near Gualba de Baix. The Gualba stream joins the rest of the streams: Sot de les Pedreres, Manera, Cambó, Can Renau, Terrades, which marks the municipal separation with Sant Celoni, and Torrent de Can Dansa that directly pours its waters to the Tordera. It is an extended term, which, from NO to Se, is eight kilometers in a straight line.

In the S sector, they cross the C-251 road that goes from Granollers to Girona and the train line from Barcelona to Portbou, which has its station at the SE end of the municipality, near the border with La Batllòria .

Many hikers and writers have taken care of Gualba, such as the romantic Victor Balaguer (1824-1901) or Artur Osona (1840-1901), but the most popular are Eugeni d'Ors (1881-1954), with his novel "Gualba the one of a thousand voices" (1915).

The whole of Gualba, but especially the upper part of its stream, closed in the Santa Fe Valley by a small marsh that carries its waters to the power stations called Central de Dalt and Central de Baix, has a beauty extraordinary natural.

The stream, which divides the term, saves the great slopes of the summits of the Montseny in the sot de la Tordera, with some spectacular jumps like the one of the Gorg Negre (place of legends and inhabited by goges), and the spectacular Salt de Gualba. The latter rushes down a steep terrain 133 meters high, which turns the stream into a stream of white foam, which is what supposedly gave the name, almost millennial, Gualba or Aigua Blanca.