Bussy-sur-Moudon (Arpitan: Bussê) is a municipality in the district Broye-Vully in the canton of Vaud in Switzerland .

Bussy-sur-Moudon is first mentioned in the 12th Century as Buxi.

Bussy-sur-Moudon has an area, as of 2009, of 3.09 square kilometers (1.19 sq mi). Of this area, 2.17 km2 (0.84 sq mi) or 70.2% is used for agricultural purposes, while 0.69 km2 (0.27 sq mi) or 22.3% is forested. Of the rest of the land, 0.23 km2 (0.089 sq mi) or 7.4% is settled (buildings or roads).

Of the built up area, housing and buildings made up 1.9% and transportation infrastructure made up 4.5%.