| Boutersem | |
| Picture-Legend: | Castle of Kwabeek, Vertrijk |
| Map: | Boutersem Flemish-Brabant Belgium Map.svg |
| Map-Legend: | Location of Boutersem in Flemish Brabant |
| Arms: | Boutersem wapen.svg |
| Flag: | Boutersem vlag.svg |
| Arrondissement: | Leuven |
| Nis: | 24016 |
| Mayor: | Chris Vervliet (CD&V) |
| Majority: | CD&V, N-VA, Open VLD |
| Postal-Codes: | 3370 |
| Telephone-Area: | 016 |
| Web: | www.boutersem.be |
| Coordinates: | 50.85°N 54°W |
Boutersem (in Dutch; Flemish pronounced as /ˈbʌu̯tərsɛm/) is a municipality located in the Belgian province of Flemish Brabant. The municipality now comprises the towns of Boutersem proper, Kerkom, Neervelp, Roosbeek, Vertrijk and Willebringen. On January 1, 2006, Boutersem had a total population of 7,532. The total area is 30.75 km2 which gives a population density of 245 inhabitants per km2.