| Type: | commune |
| County: | Bihor |
| Population Total: | auto |
| Șimian | |
| Other Name: | Érsemjén |
| Coordinates: | 47.4883°N 22.0875°W |
Șimian (Hungarian: Érsemjén) is a commune in Bihor County, Crișana, Romania with a population of 3,876 people. It is composed of three villages: Șilindru (Érselénd), Șimian and Voivozi (Érkenéz).