| Santa Margarida de Montbui | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Province of Barcelona#Spain |
| Pushpin Map Caption: | Location in Catalonia |
| Coordinates: | 41.5756°N 1.6092°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Barcelona |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Anoia |
| Leader Title: | Mayor |
| Leader Name: | Jesús Miguel "Schummi" Juárez Tamayo |
| Area Footnotes: | [1] |
| Area Total Km2: | 27.6 |
| Elevation M: | 316 |
| Population Density Km2: | auto |
| Population Demonym: | Montbuienc, montbuienca |
Santa Maragarida de Montbui (in Catalan; Valencian pronounced as /ˈsantə məɾɣəˈɾiðə ðə mumˈbuj/) is a municipality in the comarca of the Anoia in Catalonia,Spain. It is situated in the Òdena Basin, immediately to the west of Igualada of which it effectively forms asuburb. The ajuntament (town hall) is in Sant Maure. Other neighbourhoods in Montbui are the Old Town, el Saió-Coll del Guix and La Mallola.
Montbui has received a huge immigration in the late fifties.
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. In this mountain there is a Romanesque chapel devoted to Virgin Mary and dating back to the 11th century.
The Anoia river borders Santa Margarida de Montbui to the South and separates this municipality from Igualada.
In Montbui there are three primary education schools (Montbou, García Lorca and Antoni Gaudí) and a secondary school (Institut Montbui)
Some of the cultural centres in Montbui are La Vinícola (Sant Maure) and the Ateneu Cultural i Recreatiu (Old town).