| Kortenaken | |
| Map: | Kortenaken Flemish-Brabant Belgium Map.svg |
| Map-Legend: | Location of Kortenaken in Flemish Brabant |
| Arms: | Blason Kortenaken.svg |
| Flag: | Kortenaken Belgium.svg |
| Arrondissement: | Leuven |
| Nis: | 24054 |
| Mayor: | Kristof Mollu (CD&V) |
| Majority: | CD&V, N-VA, Vooruit |
| Postal-Codes: | 3470-3473-3472 |
| Telephone-Area: | 016, 011, 013 |
| Web: | www.kortenaken.be |
| Coordinates: | 50.9°N 9°W |
Kortenaken (in Dutch; Flemish pronounced as /ˈkɔrtənaːkə(n)/) is a municipality located in the Belgian province of Flemish Brabant. The municipality comprises the towns of Hoeleden, Kersbeek-Miskom, Kortenaken proper, Ransberg and Waanrode. On January 1, 2014, Kortenaken had a total population of 7,881. The total area is 49.06 km² which gives a population density of 160,63 inhabitants per km².
Every year in August there used to be a three-day festival in Kortenaken, named Boerenrock, with electro music on Friday, rock music and a party on Saturday, and on Sunday music aimed at children and their parents. The final edition of this festival took place in 2016.