Bussigny (until 2014 Bussigny-près-Lausanne) is a municipality in the Swiss canton of Vaud, located in the district of Ouest Lausannois.
Bussigny is first mentioned in 1358 as Bussignye.
Bussigny has an area, , of . Of this area, or 33.2% is used for agricultural purposes, while or 17.2% is forested. Of the rest of the land, or 48.1% is settled (buildings or roads), or 0.6% is either rivers or lakes.
Of the built up area, industrial buildings made up 11.0% of the total area while housing and buildings made up 17.6% and transportation infrastructure made up 14.1%. Power and water infrastructure as well as other special developed areas made up 1.9% of the area while parks, green belts and sports fields made up 3.5%. Out of the forested land, all of the forested land area is covered with heavy forests. Of the agricultural land, 30.9% is used for growing crops and 1.5% is pastures. All the water in the municipality is flowing water.
The municipality was part of the Morges District until it was dissolved on 31 August 2006, and Bussigny-près-Lausanne became part of the new district of Ouest Lausannois. On 1 May 2014, the official name changed from Bussigny-près-Lausanne to Bussigny.
The municipality is located west of Lausanne and near the Venoge river. It consists of the villages of Bussigny-près-Lausanne and Saint-Germain.
The blazon of the municipal coat of arms is Per fess, argent and gules, a rooster sable, lined argent, beaked, crowned and "bearded" gules.
Bussigny has a population () of . , 32.0% of the population are resident foreign nationals. Over the last 10 years (1999–2009), the population has changed at a rate of 9.9%, of which 3.2% was due to migration and 7.2% due to births and deaths.
Most of the population () speaks French (6,308 or 84.1%), with Italian being second most common (336 or 4.5%) and German being third (272 or 3.6%). Three people speak Romansh.
Of the population in the municipality, 1,462 or about 19.5% were born in Bussigny and lived there in 2000. There were 2,673 or 35.