Sieniec | |
|---|---|
Village | |
| Coordinates: 51°14′23″N 18°40′46″E / 51.23972°N 18.67944°E | |
| Country | |
| Voivodeship | Łódź |
| County | Wieluń |
| Gmina | Wieluń |

Sieniec [ˈɕɛɲɛt͡s] is a village in the administrative district of Gmina Wieluń, within Wieluń County, Łódź Voivodeship, in central Poland.