Sion Mills is a village to the south of Strabane in County Tyrone, Northern Ireland, on the River Mourne. In the 2001 Census it had a population of 2,050 people. It is a tree-lined industrial village and designated conservation area, particularly rich in architectural heritage.

County Tyrone is one of the six counties of Northern Ireland, one of the nine counties of Ulster and one of the thirty-two traditional counties of Ireland. Its county town is Omagh.