Santa Maragarida de Montbui (Catalan pronunciation: [ˈsantə məɾɣəˈɾiðə ðə mumˈbuj]) is a municipality in the comarca of the Anoia in Catalonia, Spain.

Other neighbourhoods in Montbui are the Old Town, el Saió-Coll del Guix and La Mallola.

The most famous mountain in Santa Margarida de Montbui is called La Tossa.

It has an altitude of 650 m. La Tossa mountain belongs to the serra de Miralles-Queralt range.

The Anoia river borders Santa Margarida de Montbui to the South and separates this municipality from Igualada.