| Type: | commune |
| County: | Sălaj |
| Population Total: | auto |
| Șimișna | |
| Leader Name: | Călin-Cristian Prodan[1] |
| Leader Party: | PSD |
| Leader Term: | 2020 - 2024 |
| Area Total Km2: | 45.23 |
| Coordinates: | 47.2317°N 23.6233°W |
Șimișna (Hungarian: Semesnye) is a commune located in Sălaj County, Transylvania, Romania. It is composed of two villages, Hășmaș (Alsóhagymás) and Șimișna. These were part of Rus Commune until 2002, when they were split off.